Garmin | GNX™ 375 | Garmin GNX™ 375 Pilot's Guide GPS175 / GNX375

Garmin GNX™ 375 Pilot's Guide GPS175 / GNX375
GPS 175/GNX 375
Pilot's Guide
© 2019
Garmin International, Inc., or its subsidiaries
All Rights Reserved
Except as expressly provided herein, no part of this manual may be reproduced, copied,
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This manual reflects the operation of system software v2.00. Some differences in operation
may be observed when comparing the information in this manual to later software versions.
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SOFTWARE LICENSE AGREEMENT
BY USING THE DEVICE, COMPONENT OR SYSTEM MANUFACTURED OR SOLD BY GARMIN
("THE GARMIN PRODUCT"), YOU AGREE TO BE BOUND BY THE TERMS AND CONDITIONS OF
THE FOLLOWING SOFTWARE LICENSE AGREEMENT. PLEASE READ THIS AGREEMENT
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software embedded in the Garmin Product (the "Software") in binary executable form in the
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Table of Contents
1 SYSTEM AT A GLANCE ..................................................................................................... 1-1
Overview ...................................................................................................................................................1-2
1.1 Display Layout ........................................................................................... 1-3
1.2 Unit Functions .......................................................................................... 1-4
Pilot Interface ........................................................................................................................................1-5
1.3 Unit Power ................................................................................................ 1-5
1.3.1 Instrument Test .................................................................................. 1-5
1.3.2 Power Off .......................................................................................... 1-5
1.4 SD Card Slot ............................................................................................. 1-6
1.5 Touchscreen ............................................................................................. 1-7
1.5.1 Keys ................................................................................................... 1-8
1.5.2 Menus ................................................................................................ 1-9
1.5.3 Tabs ................................................................................................. 1-10
1.5.4 Keypads ........................................................................................... 1-10
1.6 Control Knobs ........................................................................................ 1-11
1.6.1 Knob Function Indicators .................................................................. 1-11
1.6.2 Screen Captures ............................................................................... 1-12
1.7 Color Conventions .................................................................................. 1-13
Compatible Equipment ..................................................................................................................1-14
1.8 Line Replaceable Units .......................................................................... 1-14
1.8.1 ADC & AHRS .................................................................................... 1-14
1.8.2 Altitude Encoder .............................................................................. 1-15
1.8.3 ADS-B In Data .................................................................................. 1-15
2 GET STARTED ........................................................................................................................ 2-1
Databases .................................................................................................................................................2-2
2.1 Database Effective Cycles .......................................................................... 2-3
2.2 Active and Standby Databases .................................................................. 2-4
2.3 Manual Updates ....................................................................................... 2-5
2.3.1 Database Updates Page ...................................................................... 2-5
2.4 Automatic Updates ................................................................................... 2-8
2.5 Database Concierge .................................................................................. 2-9
2.5.1 Wi-Fi Setup ...................................................................................... 2-11
Connectivity .........................................................................................................................................2-12
2.6 Connext Setup ........................................................................................ 2-12
2.7 Bluetooth Setup ...................................................................................... 2-13
2.7.1 Enabling Bluetooth ........................................................................... 2-13
2.7.2 Managing Paired Devices .................................................................. 2-14
2.7.3 Importing a Flight Plan ..................................................................... 2-14
XPDR ........................................................................................................................................................2-15
2.8 XPDR Control Panel ................................................................................ 2-15
2.9 XPDR Setup ............................................................................................ 2-16
2.9.1 Displaying Data ................................................................................ 2-16
2.9.2 Enabling Extended Squitter Transmissions ......................................... 2-16
2.9.3 Assigning a Flight ID ......................................................................... 2-16
2.10 XPDR Modes ......................................................................................... 2-17
2.11 Squawk Code Keys ............................................................................... 2-18
2.11.1 VFR ................................................................................................ 2-18
2.11.2 XPDR Key ....................................................................................... 2-18
2.12 Remote Control .................................................................................... 2-20
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2.13 XPDR Alert ............................................................................................ 2-20
ADS-B Altitude Reporting .............................................................................................................2-21
2.14 ADS-B Control Panel ............................................................................. 2-21
2.14.1 ADS-B Key ...................................................................................... 2-22
2.14.2 Enabling Anonymous Mode ........................................................... 2-22
2.14.3 Assigning a Flight ID ....................................................................... 2-23
2.15 GDL 88 Alert ......................................................................................... 2-23
Pilot Settings ........................................................................................................................................2-24
2.16 CDI Scale .............................................................................................. 2-24
2.16.1 Horizontal Alarm Limits .................................................................. 2-25
2.16.2 CDI On Screen ................................................................................ 2-26
2.17 Airport Runway Criteria ........................................................................ 2-27
2.17.1 Runway Surface ............................................................................. 2-27
2.17.2 Minimum Runway Length .............................................................. 2-27
2.18 Clocks & Timers .................................................................................... 2-28
2.18.1 Timers ............................................................................................ 2-28
2.18.2 Clock ............................................................................................. 2-28
2.19 Page Shortcuts ...................................................................................... 2-29
2.20 Alerts Settings ....................................................................................... 2-30
2.21 Unit Selections ...................................................................................... 2-31
2.22 Display Brightness Control .................................................................... 2-32
2.22.1 Automatic Brightness Control ......................................................... 2-32
2.22.2 Manual Brightness Control ............................................................. 2-32
2.23 Scheduled Messages ............................................................................ 2-33
2.23.1 Message Types ............................................................................... 2-33
2.23.2 Modifying Scheduled Messages ...................................................... 2-33
Status Indications ..............................................................................................................................2-34
2.24 Alert Types ............................................................................................ 2-34
2.24.1 Alert Annunciations ........................................................................ 2-35
2.24.2 Pop-up Alerts ................................................................................. 2-36
2.24.3 Aural Alerts .................................................................................... 2-36
2.25 System Status Page ............................................................................... 2-37
2.26 GPS Status Page .................................................................................... 2-37
2.26.1 Circle of Uncertainty ....................................................................... 2-39
2.26.2 SBAS Providers ............................................................................... 2-40
2.26.3 GPS Status Annunciations .............................................................. 2-40
2.26.4 GPS Alerts ...................................................................................... 2-41
2.27 ADS-B Status Page ................................................................................ 2-42
Logs ...........................................................................................................................................................2-43
2.28 Export to SD Card ................................................................................ 2-43
3 NAVIGATION ......................................................................................................................... 3-1
Map ..............................................................................................................................................................3-3
3.1 Map Setup ................................................................................................ 3-6
3.1.1 Configure User Fields ......................................................................... 3-7
3.1.2 Map Orientation ................................................................................. 3-8
3.1.3 North Up Above ................................................................................. 3-9
3.1.4 Visual Approach ................................................................................. 3-9
3.1.5 TOPO Scale ........................................................................................ 3-9
3.1.6 Range Ring ....................................................................................... 3-10
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3.1.7 Track Vector ..................................................................................... 3-10
3.1.8 Ahead View ..................................................................................... 3-10
3.1.9 Map Detail ....................................................................................... 3-11
3.2 Map Interactions ..................................................................................... 3-13
3.2.1 Basic Interactions .............................................................................. 3-13
3.2.2 Graphical Flight Plan Editing ............................................................. 3-15
3.3 Map Overlays .......................................................................................... 3-19
3.3.1 Overlay Controls ............................................................................... 3-19
3.3.2 Overlay Status Icons ......................................................................... 3-22
3.3.3 Smart Airspace ................................................................................. 3-23
3.3.4 SafeTaxi ........................................................................................... 3-24
Active Flight Plan ..............................................................................................................................3-26
3.4 Collapse All Airways ................................................................................ 3-28
3.5 OBS ........................................................................................................ 3-28
3.6 Dead Reckoning ...................................................................................... 3-30
3.7 Parallel Track ........................................................................................... 3-31
3.8 Edit Data Fields ....................................................................................... 3-33
3.9 Flight Plan Catalog .................................................................................. 3-33
3.9.1 Catalog Route Options ..................................................................... 3-34
3.10 Create a Flight Plan ............................................................................... 3-36
3.10.1 Flight Plan Waypoint Options ......................................................... 3-37
3.11 Flight Plan Map Overlay ........................................................................ 3-38
3.12 GPS NAV Status .................................................................................... 3-39
Direct To .................................................................................................................................................3-40
3.13 Direct To Basics ..................................................................................... 3-40
3.13.1 Direct To Search Tabs ..................................................................... 3-40
3.13.2 Direct To Activation ........................................................................ 3-41
3.13.3 Navigating Direct To ....................................................................... 3-42
3.13.4 Removing a Direct-to Course .......................................................... 3-43
3.13.5 User Holds ...................................................................................... 3-44
Waypoints ..............................................................................................................................................3-45
3.14 Waypoint Information ........................................................................... 3-45
3.15 Waypoint Selection ............................................................................... 3-48
3.15.1 Waypoint Autofill ........................................................................... 3-48
3.15.2 Search Tabs .................................................................................... 3-49
3.16 Create User Waypoints ......................................................................... 3-51
3.16.1 Define Waypoint Criteria ................................................................ 3-52
3.16.2 Edit an Existing User Waypoint ....................................................... 3-54
3.16.3 Import User Waypoints ................................................................... 3-54
3.17 Nearest ................................................................................................. 3-55
Procedures ............................................................................................................................................3-57
3.18 Flight Procedure Basics .......................................................................... 3-58
3.18.1 GPS Flight Phase Annunciations ...................................................... 3-60
3.19 Departures ............................................................................................ 3-62
3.19.1 Flight Plan Departure Options ......................................................... 3-63
3.20 Arrivals ................................................................................................. 3-64
3.20.1 Flight Plan Arrival Options .............................................................. 3-65
3.21 Approaches .......................................................................................... 3-66
3.21.1 Flight Plan Approach Options ......................................................... 3-68
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Table of Contents
3.21.2 Missed Approach ........................................................................... 3-69
3.21.3 Approach Hold ............................................................................... 3-70
3.21.4 DME Arc ........................................................................................ 3-72
3.21.5 RF Legs ........................................................................................... 3-73
3.21.6 Vectors to Final .............................................................................. 3-73
3.21.7 ILS Approach .................................................................................. 3-74
3.21.8 RNAV Approaches .......................................................................... 3-74
3.21.9 Visual Approach ............................................................................. 3-80
3.21.10 Autopilot Outputs ........................................................................ 3-82
4 PLANNING .............................................................................................................................. 4-1
Vertical Calculator ..............................................................................................................................4-3
4.1 VCALC Page ............................................................................................. 4-3
4.2 VCALC Setup ............................................................................................ 4-4
Fuel Planning ..........................................................................................................................................4-5
4.3 Fuel Planning Page .................................................................................... 4-5
4.3.1 Fuel Planning Modes .......................................................................... 4-5
4.3.2 Computing Fuel Statistics ................................................................... 4-7
DALT/TAS/Wind Calculator ............................................................................................................4-8
4.4 DALT/TAS/Wind Page ................................................................................ 4-8
4.4.1 Editing Input Data .............................................................................. 4-8
4.4.2 Computing DALT/TAS/Wind Statistics ............................................... 4-10
RAIM Prediction .................................................................................................................................4-11
4.5 RAIM Prediction Page .............................................................................. 4-11
4.5.1 Calculating RAIM Status ................................................................... 4-12
4.5.2 RAIM Status Indications .................................................................... 4-12
5 HAZARD AWARENESS ..................................................................................................... 5-1
Weather Awareness ............................................................................................................................5-3
5.1 Data Transmission Limitations ................................................................... 5-3
5.1.1 Line of Sight Reception ....................................................................... 5-3
5.1.2 Per FAA TSO-C157b ........................................................................... 5-4
5.1.3 NOTAM 30-Day Limitation ................................................................. 5-4
5.2 FIS-B Weather Display ............................................................................... 5-5
5.3 FIS-B Weather Setup ................................................................................. 5-6
5.4 FIS-B Weather Interactions ........................................................................ 5-7
5.5 FIS-B Weather Products ............................................................................. 5-8
5.5.1 Product Status .................................................................................... 5-8
5.5.2 Product Age ....................................................................................... 5-9
5.5.3 FIS-B NEXRAD .................................................................................. 5-10
5.5.4 METARs and TAFs ............................................................................ 5-12
5.5.5 AIRMETs ........................................................................................... 5-13
5.5.6 SIGMETs ........................................................................................... 5-14
5.5.7 PIREPs .............................................................................................. 5-14
5.5.8 Winds/Temps Aloft ........................................................................... 5-15
5.5.9 TFRs ................................................................................................. 5-15
5.6 Raw Text Reports .................................................................................... 5-16
5.7 FIS-B Ground Reception Status ................................................................ 5-18
Traffic Awareness .............................................................................................................................5-19
5.8 Traffic Applications ................................................................................. 5-19
5.8.1 Traffic Application Failures ................................................................ 5-20
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5.9 Traffic Display ......................................................................................... 5-21
5.10 Traffic Setup ......................................................................................... 5-25
5.10.1 Motion Vectors .............................................................................. 5-26
5.10.2 Altitude Filtering ............................................................................. 5-26
5.11 Traffic Interactions ................................................................................ 5-27
5.12 Traffic Annunciations ............................................................................ 5-28
5.13 Traffic Alerting ...................................................................................... 5-29
Terrain Awareness ............................................................................................................................5-31
5.14 Terrain Configurations .......................................................................... 5-31
5.14.1 GPS Altitude for Terrain .................................................................. 5-32
5.15 Database Limitations ............................................................................. 5-33
5.16 Terrain Display ...................................................................................... 5-34
5.17 Terrain Setup ........................................................................................ 5-35
5.18 Terrain Proximity ................................................................................... 5-36
5.18.1 Terrain Elevation Depictions ............................................................ 5-36
5.18.2 Obstacle Elevation Depictions ......................................................... 5-37
5.19 Terrain Alerting ..................................................................................... 5-39
5.19.1 Alert Types ..................................................................................... 5-39
5.19.2 Alerting Thresholds ........................................................................ 5-40
5.19.3 Inhibiting FLTA & PDA Alerts .......................................................... 5-41
5.19.4 FLTA & PDA Alerts .......................................................................... 5-42
6 MESSAGES .............................................................................................................................. 6-1
Advisory Messages ..............................................................................................................................6-2
6.1 Message Key ............................................................................................. 6-2
6.2 Airspace Advisories ................................................................................... 6-2
6.3 Database Advisories .................................................................................. 6-3
6.4 Flight Plan Advisories ................................................................................ 6-4
6.5 GPS/WAAS Advisories ............................................................................... 6-6
6.6 Navigation Advisories ................................................................................ 6-8
6.7 Pilot Specified Advisories ........................................................................... 6-9
6.8 System Hardware Advisories ................................................................... 6-10
6.9 Terrain Advisories .................................................................................... 6-13
6.10 Traffic System Advisories ....................................................................... 6-14
6.10.1 Traffic Advisories, GPS 175 ............................................................. 6-14
6.10.2 Traffic Advisories, GNX 375 ............................................................ 6-16
6.11 VCALC Advisories ................................................................................. 6-17
6.12 Waypoint Advisories ............................................................................. 6-17
7 QUALIFICATION .................................................................................................................. 7-1
7.1 Glove Qualification ................................................................................... 7-1
8 GLOSSARY ............................................................................................................................... 8-1
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Warnings, Cautions, and Notes
WARNING
DO NOT USE TERRAIN AVOIDANCE DISPLAYS AS THE SOLE SOURCE OF INFORMATION
FOR MAINTAINING SEPARATION FROM TERRAIN AND OBSTACLES. GARMIN OBTAINS
TERRAIN AND OBSTACLE DATA FROM THIRD PARTY SOURCES AND CANNOT
INDEPENDENTLY VERIFY THE ACCURACY OF THE INFORMATION.
WARNING
DO NOT RELY SOLELY UPON TERRAIN PROXIMITY DATA FOR TERRAIN AVOIDANCE.
TERRAIN PROXIMITY IS NOT A CERTIFIED TERRAIN AWARENESS SYSTEM. IT IS AN AID
TO SITUATIONAL AWARENESS ONLY. USING TERRAIN PROXIMITY DATA DOES NOT
UNDER ANY CIRCUMSTANCES OR CONDITIONS RELIEVE THE PILOT’S RESPONSIBILITY
TO SEE AND AVOID TERRAIN OR OBSTACLES.
WARNING
ALWAYS REFER TO CURRENT AERONAUTICAL CHARTS AND NOTAMS FOR
VERIFICATION OF DISPLAYED AERONAUTICAL INFORMATION. DISPLAYED
AERONAUTICAL DATA MAY NOT INCORPORATE THE LATEST NOTAM INFORMATION.
WARNING
NEVER USE GPS ALTITUDE FOR VERTICAL NAVIGATION. THE ALTITUDE CALCULATED
BY GPS RECEIVERS IS GEOMETRIC HEIGHT ABOVE MEAN SEA LEVEL AND COULD VARY
SIGNIFICANTLY FROM THE ALTITUDE DISPLAYED BY PRESSURE ALTIMETERS (E.G., THE
OUTPUT FROM THE GDC 74A/B AIR DATA COMPUTER) OR OTHER ALTIMETERS IN THE
AIRCRAFT. ALWAYS REFER TO THE PRESSURE ALTIMETERS IN THE AIRCRAFT FOR
CURRENT PRESSURE ALTITUDE.
WARNING
NEVER USE EXPIRED DATABASES. UPDATE DATABASES REGULARLY TO ENSURE
CURRENCY. USE OUT OF DATE DATABASE INFORMATION AT YOUR OWN RISK.
WARNING
NEVER USE BASEMAP INFORMATION (LAND AND WATER DATA) AS THE SOLE MEANS
OF NAVIGATION. BASEMAP DATA IS INTENDED ONLY TO SUPPLEMENT OTHER
APPROVED NAVIGATION DATA SOURCES AND SHOULD BE CONSIDERED ONLY AN AID
TO ENHANCE SITUATIONAL AWARENESS.
WARNING
DO NOT RELY SOLELY UPON THE DISPLAY OF TRAFFIC INFORMATION TO
ACCURATELY DEPICT ALL OF THE TRAFFIC WITHIN RANGE OF THE AIRCRAFT. DUE TO
LACK OF EQUIPMENT, POOR SIGNAL RECEPTION, AND/OR INACCURATE
INFORMATION FROM AIRCRAFT OR GROUND STATIONS, TRAFFIC MAY BE PRESENT
THAT IS NOT REPRESENTED ON THE DISPLAY.
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Warnings, Cautions, and Notes
WARNING
NEVER USE DATALINK WEATHER INFORMATION FOR MANEUVERING IN, NEAR, OR
AROUND AREAS OF HAZARDOUS WEATHER. INFORMATION CONTAINED WITHIN
DATALINK WEATHER PRODUCTS MAY NOT ACCURATELY DEPICT CURRENT WEATHER
CONDITIONS.
WARNING
DO NOT USE THE INDICATED DATALINK WEATHER PRODUCT AGE TO DETERMINE
THE AGE OF THE WEATHER INFORMATION SHOWN BY THE DATALINK WEATHER
PRODUCT. DUE TO TIME DELAYS INHERENT IN GATHERING AND PROCESSING
WEATHER DATA FOR DATALINK TRANSMISSION, THE WEATHER INFORMATION
SHOWN BY THE DATALINK WEATHER PRODUCT MAY BE OLDER THAN THE
INDICATED WEATHER PRODUCT AGE.
WARNING
DO NOT RELY SOLELY UPON DATALINK SERVICES TO PROVIDE TFR INFORMATION.
ALWAYS CONFIRM TFR INFORMATION THROUGH OFFICIAL SOURCES SUCH AS
FLIGHT SERVICE STATIONS OR AIR TRAFFIC CONTROL.
WARNING
ALWAYS REFER TO CURRENT AERONAUTICAL CHARTS FOR APPROPRIATE MINIMUM
CLEARANCE ALTITUDES. THE DISPLAYED MSAs ARE ONLY ADVISORY IN NATURE AND
SHOULD NOT BE RELIED UPON AS THE SOLE SOURCE OF OBSTACLE AND TERRAIN
AVOIDANCE INFORMATION.
WARNING
DO NOT USE GPS TO NAVIGATE TO ANY ACTIVE WAYPOINT IDENTIFIED AS A “NON
WGS84 WPT” BY A SYSTEM MESSAGE. “NON WGS84 WPT” WAYPOINTS ARE DERIVED
FROM AN UNKNOWN MAP REFERENCE DATUM THAT MAY BE INCOMPATIBLE WITH
THE MAP REFERENCE DATUM USED BY GPS (KNOWN AS WGS84) AND MAY BE
POSITIONED IN ERROR AS DISPLAYED.
WARNING
DO NOT RELY SOLELY UPON THE DISPLAY OF TRAFFIC INFORMATION FOR COLLISION
AVOIDANCE MANEUVERING. THE TRAFFIC DISPLAY DOES NOT PROVIDE COLLISION
AVOIDANCE RESOLUTION ADVISORIES AND DOES NOT UNDER ANY CIRCUMSTANCES
OR CONDITIONS RELIEVE THE PILOT’S RESPONSIBILITY TO SEE AND AVOID OTHER
AIRCRAFT.
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Warnings, Cautions, and Notes
WARNING
DO NOT RELY ON THE ACCURACY OF ATTITUDE AND HEADING INDICATIONS IN
GEOGRAPHIC AREAS WHERE VARIATION IN THE EARTH’S MAGNETIC FIELD EXISTS.
THIS INCLUDES: NORTH OF 72° NORTH LATITUDE AT ALL LONGITUDES; SOUTH OF 70°
SOUTH LATITUDE AT ALL LONGITUDES; NORTH OF 65° NORTH LATITUDE BETWEEN
LONGITUDE 75° W. AND 120° W. (NORTHERN CANADA); NORTH OF 70° NORTH
LATITUDE BETWEEN LONGITUDE 70° W. AND 128° W. (NORTHERN CANADA); NORTH
OF 70° NORTH LATITUDE BETWEEN LONGITUDE 85° E. AND 114° E. (NORTHERN
RUSSIA); SOUTH OF 55° SOUTH LATITUDE BETWEEN LONGITUDE 120° E. AND 165° E.
(REGION SOUTH OF AUSTRALIA AND NEW ZEALAND).
WARNING
DO NOT RELY SOLELY UPON DATALINK SERVICES TO PROVIDE TFR INFORMATION.
ALWAYS CONFIRM TFR INFORMATION THROUGH OFFICIAL SOURCES SUCH AS
FLIGHT SERVICE STATIONS OR AIR TRAFFIC CONTROL.
WARNING
DO NOT LEARN OPERATIONAL PROCEDURES IN THE AIR. FOR SAFETY REASONS,
THOROUGHLY PRACTICE BASIC OPERATION ON THE GROUND BEFORE ACTUAL USE.
WARNING
REVIEW AND UNDERSTAND ALL ASPECTS OF THIS PILOT’S GUIDE. DOING SO REDUCES
THE RISK OF UNSAFE OPERATION.
WARNING
ALWAYS RESOLVE ANY DISCREPANCIES BETWEEN THE DISPLAY AND OTHER
NAVIGATION SOURCES WHEN THEY OCCUR. DURING FLIGHT OPERATIONS,
COMPARE DISPLAY INDICATIONS TO INFORMATION FROM OTHER NAVAIDS, VISUAL
SIGHTINGS, CHARTS, AND OTHER AVAILABLE SOURCES BEFORE CONTINUING
NAVIGATION.
CAUTION
DO NOT CLEAN DISPLAY SURFACES WITH ABRASIVE CLOTHS OR CLEANERS
CONTAINING AMMONIA. THEY WILL HARM THE ANTI-REFLECTIVE COATING.
CAUTION
ENSURE THAT ANY UNIT REPAIRS ARE MADE BY AN AUTHORIZED GARMIN
SERVICE CENTER. UNAUTHORIZED REPAIRS OR MODIFICATIONS COULD VOID
BOTH THE WARRANTY AND AFFECT THE AIRWORTHINESS OF THE AIRCRAFT.
190-02207-02 Rev. B
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ix
Warnings, Cautions, and Notes
NOTE
All visual depictions contained within this document, including screen images
of the system panel and displays, are subject to change and may not reflect
the most current system and aviation databases. Depictions of equipment
may differ slightly from the actual equipment.
NOTE
The United States government operates the Global Positioning System and is
solely responsible for its accuracy and maintenance. The GPS system is
subject to changes which could affect the accuracy and performance of all
GPS equipment. Portions of the system utilize GPS as a precision electronic
NAVAID. Therefore, as with all NAVAIDs, information presented by the
system can be misused or misinterpreted and, therefore, become unsafe.
NOTE
This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
NOTE
Interference from GPS repeaters operating inside nearby hangars can cause
an intermittent loss of attitude and heading displays while the aircraft is on
the ground. Moving the aircraft more than 100 yards away from the source
of the interference should alleviate the condition.
NOTE
Use of polarized eye wear may cause the flight displays to appear dim or
blank.
NOTE
This product, its packaging, and its components contain chemicals known to
the State of California to cause cancer, birth defects, or reproductive harm.
This notice is being provided in accordance with California’s Proposition 65.
If you have any questions or would like additional information, please refer
to our website at www.garmin.com/prop65.
NOTE
Operating the system in the vicinity of metal buildings, metal structures, or
electromagnetic fields can cause sensor differences that may result in
nuisance miscompare annunciations during start up, shut down, or while
taxiing. If one or more of the sensed values are unavailable, the annunciation
indicates no comparison is possible.
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Warnings, Cautions, and Notes
NOTE
The system responds to a terminal procedure based on data coded within
that procedure in the Navigation Database. Differences in system operation
may be observed among similar types of procedures due to differences in the
Navigation Database coding specific to each procedure.
NOTE
Do not use SafeTaxi functions as the basis for ground maneuvering. SafeTaxi
functions do not comply with the requirements of AC 120-76C and are not
qualified for use as an airport moving map display. SafeTaxi is to be used for
orientation purposes only.
NOTE
The FAA has asked Garmin to remind pilots who fly with Garmin
database-dependent avionics of the following:
• It is the pilot’s responsibility to remain familiar with all FAA regulatory and
advisory guidance and information related to the use of databases in the
National Airspace System.
• Garmin equipment will only recognize and use databases that are obtained
from Garmin or Jeppesen. Databases obtained from Garmin or Jeppesen that
have a Type 2 LOA from the FAA are assured compliance with all data quality
requirements (DQRs). A copy of the Type 2 LOA is available for each
applicable database and can be viewed at flyGarmin.com by selecting
“Aviation Database Declarations.”
• Use of a current Garmin or Jeppesen database in your Garmin equipment
is required for compliance with established FAA regulatory guidance, but
does not constitute authorization to fly any and all terminal procedures that
may be presented by the system. It is the pilot’s responsibility to operate in
accordance with established AFM(S) and regulatory guidance or limitations
as applicable to the pilot, the aircraft, and installed equipment.
NOTE
The pilot/operator must review and be familiar with Garmin’s database
exclusion list as discussed in SAIB CE-14-04 to determine what data may be
incomplete. The database exclusion list can be viewed at flyGarmin.com by
selecting “Aviation Database Declarations.”
NOTE
The pilot/operator must have access to Garmin and Jeppesen database alerts
and consider their impact on the intended aircraft operation. The database
alerts can be viewed at flyGarmin.com by selecting “Aviation Database
Alerts.”
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xi
Compliance
NOTE
If the pilot/operator wants or needs to adjust the database, contact Garmin
Product Support.
NOTE
Garmin requests the flight crew report any observed discrepancies related to
database information. These discrepancies could come in the form of an
incorrect procedure; incorrectly identified terrain, obstacles and fixes; or any
other displayed item used for navigation or communication in the air or on
the ground. Visit flyGarmin.com and select “Aviation Data Error Report.”
NOTE
The navigation databases used in Garmin navigation systems contain Special
Procedures. Prior to flying these procedures, pilots must have specific FAA
authorization, training, and possession of the corresponding current, and
legitimately-sourced chart (approach plate, etc.). Inclusion of the Special
Procedure in the navigation database DOES NOT imply specific FAA
authorization to fly the procedure.
AC 90-100A Statement of Compliance
The Garmin navigational unit meets the performance and functional requirements of
FAA Advisory Circular (AC) 90-100A, U.S. Terminal and En Route Area Navigation
(RNAV) Operations.
xii
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
About This Guide
Record of Revision
REVISION
DATE
CHANGE DESCRIPTION
1
02/06/19
Experimental Release.
A
03/20/19
Production Release.
B
04/17/19
Minor edits.
Layout
SECTION
TITLE
1
System at a Glance
2
Get Started
3
Navigation
4
Planning
5
Hazard Awareness
6
Messages
7
Qualification
8
Glossary
The design and layout of this guide is
intended to provide clear, concise
sections written in the logical order
of a pilot’s flight instrument and
systems scan.
Electronic Document Features
Versions of this guide are saved in Adobe Acrobat and are available for download at:
garmin.com/manuals
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
xiii
Reference Documentation
Reference Manuals
DOCUMENT
P/N
GDL 88 ADS-B Transceiver Pilot’s Guide
190-01122-03
Reference Websites
WEBSITE
ADDRESS
Aviation Limited Warranty
https://www.garmin.com/en-US/legal/aviation-limited-warranty
Database Concierge
Go to http://www.flygarmin.com/support and select
Database Management.
ADS-B Academy
https://www.garmin.com/us/intheair/ads-b
Connext
http://www.garmin.com/connext
FAA Regulatory and
Guidance Library
https://rgl.faa.gov
xiv
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
System at a Glance
1
System at a Glance
OVERVIEW
1.1
1.2
Display Layout .......................................................................................1-3
Unit Functions ......................................................................................1-4
PILOT INTERFACE
1.3
1.4
1.5
1.6
1.7
Unit Power ............................................................................................1-5
SD Card Slot ..........................................................................................1-6
Touchscreen ..........................................................................................1-7
Control Knobs .....................................................................................1-11
Color Conventions...............................................................................1-13
COMPATIBLE EQUIPMENT
1.8
Line Replaceable Units .......................................................................1-14
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1-1
System at a Glance
Overview
The GPS 175 and GNX 375 are the first 2” by 6.25” panel mount navigators to
employ full color capacitive touchscreen technology.
The GPS 175 is a TSO-C146e compliant GPS/WAAS navigator with en route,
terminal, and precision/non-precision approach capabilities. The GNX 375 combines
the functionality of the GPS 175 with a TSO-C112e (Level 2els, Class 1) compliant
mode S transponder.
Each unit is Bluetooth compatible, providing flight plan, traffic, weather, and
position data to an available portable electronic device.
GPS 175 NAVIGATOR
• Certified compatible with ADS-B Out 2020 mandate
• TSO-C146e compliant GPS/WAAS navigator and internal GPS source
• TSO-C195b (Class B1, B3, B5, B7) compliant with an external active
ADS-B In source
GNX 375 NAVIGATOR WITH TRANSPONDER
• TSO-C88b compliant automatic pressure altitude reporting equipment
• TSO-C146e compliant GPS/WAAS navigator
• TSO-C112e (Level 2els, Class 1) compliant mode S transponder
• TSO-C154c (Class A1S) compliant 1090/UAT receiver
• TSO-C157b (Class 1) compliant FIS-B equipment uplink
• TSO-C166b compliant ADS-B Out 1090 MHz extended squitter
• TSO-C195b (Class B1, B3, B5, B7, C1, C2, C3, C5, C7) compliant
ADS-B In source
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GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
System at a Glance
1.1
Display Layout
2
3
4
5
1
6
1
Bezel
Includes the power key, mechanical knobs, photocell, and SD card slot.
Ledges provide hand stability when performing data entry and making
selections.
2
Touchscreen
Multi-touch color display provides controls for unit operation.
3
Photocell
Measures cockpit ambient light level to automatically adjust display
brightness for day and night.
4
SD Card Slot
Interface for loading database, exporting log files, and updating
software. Compatibility with Flight Stream 510 allows wireless database
transfer from the Garmin Pilot app via Database Concierge.
5
Power/Home Key
Powers the unit on or off and provides direct access to the Home page.
6
Inner & Outer Knobs
Multipurpose dual concentric knob allows data entry, list scrolling, map
range control, and page navigation.
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1-3
System at a Glance
1.2
Unit Functions
GNX 375 NAVIGATOR
W/TRANSPONDER
GPS 175 NAVIGATOR
• Moving Map
• Moving Map
• Terrain
• Terrain
• Flight Plan
• Flight Plan
• Graphical Flight Planning
• Graphical Flight Planning
• Waypoint Information
• Waypoint Information
• Nearest
• Nearest
• FIS-B Weather Display [1] [2]
• FIS-B Weather Receiver & Display [2]
• ADS-B In Traffic Display [1] [2]
• ADS-B In Traffic Receiver & Display
[2]
• Terrain Avoidance
• System Advisories
• Scheduled Messages
• Clock
• ADS-B Out on 1090 MHz Extended
Squitter
• Terrain Avoidance
• System Advisories
• CDI
• Internal GPS Receiver
• Built-in Bluetooth
• Database Concierge Access [3]
• Scheduled Messages
• Clock
• CDI
• Internal GPS Receiver
• Built-in Bluetooth
• Mode S Transponder
• Database Concierge Access [3]
[1]
[2]
[3]
1-4
Requires external ADS-B In product.
ADS-B In via 1090 MHz (traffic) and 978 MHz UAT (traffic and weather).
Requires Wi-Fi connection via Flight Stream 510.
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
System at a Glance
Pilot Interface
1.3
Unit Power
The unit receives power directly from the aircraft’s electrical system. Upon power-up,
the bezel key backlight momentarily illuminates. System failure annunciations
typically disappear within the first 30 seconds after power-up.
The start-up screen presents the unit software versions, the name and status of all
installed databases, and the Database Updates page access key. These features are
available only at power up.
Tapping Continue advances to the Instrument Test page.
If an instrument remains flagged after one minute, check the status of the
associated LRU, then contact a Garmin dealer for support.
1.3.1
Instrument Test
To ensure safe operation, continuous built-in test features exercise the unit’s
processor, memory, external inputs, and outputs. The Instrument Test page displays
the results of all external equipment checks performed by the unit.
Review this list to ensure that all
CDI outputs and other displayed
data are correct for the
connected equipment.
1.3.2
Power Off
WARNING
NEVER ATTEMPT TO POWER OFF THE UNIT WHILE AIRBORNE UNLESS
OPERATIONAL PROCEDURES DICTATE.
Pushing and holding the Power key for
0.5 seconds initiates the power off sequence.
Shutdown occurs once the timer reaches zero.
Power off annunciation temporarily replaces
the knob function indicator.
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1-5
System at a Glance
1.4
SD Card Slot
NOTE
Do not remove or insert an SD card while in flight. Always verify the system
is powered off before inserting or removing an SD card.
The navigator requires an SD card for the following tasks.
• Exporting data logs
• Saving system configurations
• Capturing screen images
• Enabling Flight Stream connectivity
• Upgrading software
• Updating databases
INSERT AN SD CARD
When inserting an SD card:
1.
Verify unit power is off and the slot is empty.
2.
Hold card such that label faces left edge of display screen.
3.
Ensure back edge of card is flush with display bezel after insertion.
EJECT AN SD CARD
1.
Power off the unit.
2.
Release the spring latch by pressing lightly on exposed edge of card.
1-6
GPS 175/GNX 375 Pilot’s Guide
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System at a Glance
1.5
Touchscreen
GESTURES
TAP
Touching the screen briefly with a single finger.
Use this gesture for:
• Opening a page or menu
• Activating a command key or data entry field
• Displaying map feature information
• Selecting an option within an application
TAP AND HOLD
Certain momentary controls (e.g., directional arrow
keys) provide a secondary tap and hold function.
Tap the key and hold your finger in place until the
desired action occurs.
Use this gesture for:
• Scrolling with arrow keys
• Increasing/decreasing values continuously
SWIPE
A smooth motion that involves touching an object,
then sliding your finger across the screen and lifting
up.
Use this gesture for:
• Accessing multiple panes (right or left swipes)
• Viewing and scrolling lists
• Panning across a map display
FLICK
Swiping the screen in a quick upward or downward
motion. Information moves at a fast speed (faster than
if holding the arrow key), then slows to a stop.
Use this gesture for:
• Scrolling an item list
PINCH & STRETCH
Touch any map with two fingers at the same time,
then bring the fingers close together (pinch) or spread
them apart (stretch). Just remember: stretch to zoom
in and pinch to zoom out.
Use this gesture for:
• Magnifying map features
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1-7
System at a Glance
1.5.1
Keys
COMMON COMMANDS
Open the system messages
list. A flashing icon indicates
unread messages.
Cancel an active function
without inputting data.
Open a context menu.
Input a specified value.
Return to the previous
page.
Select the corresponding
item (e.g., database
update). A checkmark
confirms selection.
FUNCTION KEYS
Toggle keys turn a specific function on or off.
The current state of the function is indicated
below the key label.
On
Off
APP ICONS
Tapping one of these icons opens the corresponding application. Some apps provide
additional icons for accessing functions on subpages (e.g., Utilities, System).
1-8
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System at a Glance
1.5.2
Menus
Menus group related controls into an expandable pane, allowing access to multiple
functions on a single page. Depending on the number of available functions, a menu
may comprise more than one pane.
Multiple panes are accessible by
way of a left/right swipe or inner
knob turn.
Active Pane
An indicator at the bottom of the menu shows
which pane is active.
POP-UP MENUS
Pop-up menus open to the default
or previously selected value.
Underlying Page Hidden
Default or Current Setting
LISTS
Scrollable lists group control keys related to a single function (e.g., FIS-B Weather).
When scrolling, all keys in the list are inactive.
Toggle keys either enable or disable list items.
In some cases, Settings or Range keys provide
access to selectable setting options.
Scroll Bar
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1-9
System at a Glance
1.5.3
Tabs
Tabs group information into individual panes. Content includes scrolling lists, data
fields, function keys, or a combination of controls.
Tabs are located along the left and right sides of a pane.
Active
Tabs
Inactive
Tabs
Inactive
Tabs
1.5.4
Keypads
The navigator employs multiple keypad types to serve specific settings and functions.
NUMERIC
Numeric keypads
open on a single
pane.
Backspace and
Enter keys always
appear at the right
of the screen.
ALPHANUMERIC
Alphanumeric keypads comprise multiple keysets that are accessible by way of swipe
or key selection.
Selectable Keysets
An indicator shows which keyset is active.
Keys a through m are active by default.
Active Keyset
1-10
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190-02207-02 Rev. B
System at a Glance
1.6
Control Knobs
Inner and outer control knobs offer an alternative method for
selecting and modifying data without the use of touch keys.
Outer
Inner
KNOB FUNCTIONS
• Selecting reference controls
Outer Knob
• Selecting a page shortcut
• Cursor placement and initial field/page selections
• Moving cursor forward or backward within data field
• Zooming
Inner Knob
(Turn)
• Scrolling lists
• Inputting data
• Modifying individual characters in data entry field
Inner Knob
(Push)
1.6.1
• Entering current or specified numerical value
• Toggling Map page user fields on or off
• Accessing the Direct To function from the Home page
Knob Function Indicators
A locater bar works in conjunction with the outer knob providing quick access to the
indicated page. Turning the outer knob clockwise or counter-clockwise moves the
locater through displayed menu options.
Active
Page
Slot 1
(Map)
190-02207-02 Rev. B
Available Knob
Function
Slot 3
Slot 2
Slot 1 is a dedicated Map
page shortcut. Slots 2 and 3
are customizable. Selectable
page options are dependent
upon configuration.
The active page name
displays in cyan.
Additional icons located to
the right of the bar indicate
available knob functions for
the associated page (e.g.,
zoom, numeric entry).
GPS 175/GNX 375 Pilot’s Guide
1-11
System at a Glance
1.6.2
Screen Captures
FUNCTIONAL LIMITATIONS
• Not available with Flight Stream 510
Save images to an SD card at any time using a screen capture. Images automatically
save to the “print” folder in the SD card root directory.
1.
Insert an SD card into the card slot.
2.
Push and hold the control knob.
3.
With knob depressed, push and release the Home/Power key.
A camera icon momentarily shows in the annunciator bar indicating a successful
screen capture. To view saved images, remove the SD card and open the “print”
folder on a computer.
1-12
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System at a Glance
1.7
Color Conventions
Red
• Warning conditions
• Operating limits
Yellow
• Cautionary conditions
• Conditional operating ranges
Green
• Safe operating conditions
• Normal operating ranges
• Engaged modes
White
• Scales and markings
• Current data and values
• Heading legs
Magenta
• GPS data
• Active flight plan legs
• Parallel track
Cyan
• Pilot-selectable references
Gray
• Missing or expired data
• Product unavailable
Blue
• Sky
• Water
Brown
• Ground
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GPS 175/GNX 375 Pilot’s Guide
1-13
System at a Glance
Compatible Equipment
1.8
Line Replaceable Units
SYSTEM REQUIRED LRUS
The system consists of multiple LRUs,
which are installed behind the
instrument panel or in a separate
avionics bay. Their modular design
aids system maintenance and unit
replacement.
GPS antenna
SYSTEM OPTIONAL LRUS
ADAHRS or ADC with AHRS
GAD 29 adapter
Optional LRUs may include
compatible equipment from either
Garmin or a third party manufacturer.
GAE 12 altitude encoder
(applicable to GNX 375 only)
G3X Touch
G500/G600
G500/G600 TXi
GMX 200
MX 20
OPTIONAL INTERFACES
GDL 88/GTX 345 ADS-B transceiver
(applicable to GPS 175 only)
1.8.1
ADC & AHRS
AHRS units have a magnetometer interface for determining magnetic heading. ADC
units have a Pitot-static interface for measuring pressure altitude.
LRU
1-14
DISPLAY
GDC 74
ADC
GNX
G3X
G500/G600
GPS
GNX
FUNCTION
• Air temperature
• Pressure Altitude
ADC
• Air temperature
• Pressure Altitude
GSU 25/73
Integrated ADAHRS
GNX
AHRS
• Heading
GRS 77
AHRS
GNX
• Heading
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
System at a Glance
1.8.2
Altitude Encoder
LRU
DISPLAY
GAE 12
Provides pressure altitude
information to the
transponder.
GNX
1.8.3
FUNCTION
Aircraft static pressure
ADS-B In Data
LRU
DISPLAY
FUNCTION
Traffic Services
• ADS-B
• TIS-B
Weather Services
• FIS-B
GDL 88
GTX 345
Provides datalink traffic
and weather.
Weather Products
Map & FIS-B Weather:
• Precip
GPS
• METARs
FIS-B Weather only:
• Precip
• Winds Aloft
• METARs/TAFs
• AIRMETs
• SIGMETs
• TFRs
• PIREPs
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GPS 175/GNX 375 Pilot’s Guide
1-15
INTENTIONALLY LEFT BLANK
1-16
GPS 175/GNX 375 Pilot’s Guide
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Get Started
2
Get Started
DATABASES
2.1
2.2
2.3
2.4
2.5
Database Effective Cycles.......................................................................2-3
Active and Standby Databases ...............................................................2-4
Manual Updates ....................................................................................2-5
Automatic Updates................................................................................2-8
Database Concierge ..............................................................................2-9
CONNECTIVITY
2.6
2.7
Connext Setup ....................................................................................2-12
Bluetooth Setup ..................................................................................2-13
XPDR
2.8
2.9
2.10
2.11
2.12
2.13
XPDR Control Panel .............................................................................2-15
XPDR Setup .........................................................................................2-16
XPDR Modes .......................................................................................2-17
Squawk Code Keys ..............................................................................2-18
Remote Control ...................................................................................2-20
XPDR Alert ..........................................................................................2-20
ADS-B ALTITUDE REPORTING
2.14
2.15
ADS-B Control Panel............................................................................2-21
GDL 88 Alert .......................................................................................2-23
PILOT SETTINGS
2.16
2.17
2.18
2.19
2.20
2.21
2.22
2.23
CDI Scale .............................................................................................2-24
Airport Runway Criteria .......................................................................2-27
Clocks & Timers ...................................................................................2-28
Page Shortcuts ....................................................................................2-29
Alerts Settings .....................................................................................2-30
Unit Selections.....................................................................................2-31
Display Brightness Control ...................................................................2-32
Scheduled Messages ...........................................................................2-33
STATUS INDICATIONS
2.24
2.25
2.26
2.27
Alert Types ..........................................................................................2-34
System Status Page..............................................................................2-37
GPS Status Page ..................................................................................2-37
ADS-B Status Page...............................................................................2-42
LOGS
2.28
Export to SD Card ...............................................................................2-43
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GPS 175/GNX 375 Pilot’s Guide
2-1
Get Started
Databases
NOTE
The navigator supports SD cards in the FAT32 format only, with capacities
ranging between 8 GB and 32 GB.
Databases are stored in the unit’s internal memory. To view update cycles, or to
purchase individual databases or database packages, go to flyGarmin.com.
There are two methods for loading and updating databases. Do not attempt either
of these while in flight (on ground only).
• Load databases via SD card. Once loading completes, you may power off
the unit and remove the card.
• Transfer databases from a Flight Stream 510 wireless datacard. This
method requires the Garmin Pilot app on a portable electronic device.
SUPPORTED DATABASES
Basemap
Bodies of water, geopolitical boundary, and road
information
Navigation
Airport, NAVAID, waypoint, and airspace information
(Garmin or Jeppesen)
Obstacles
Obstacle and wire data
SafeTaxi
Airport surface diagrams
Terrain
Terrain elevation data
For information regarding third party navigation databases, go to jeppesen.com.
2-2
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Get Started
2.1
Database Effective Cycles
Most databases expire at regular intervals. Exceptions include Basemap and Terrain,
which neither expire nor update on a regular schedule.
The start-up page lists all currently
installed databases. Review this list for
current database types, cycle numbers,
and expiration dates.
Yellow text denotes when a database is:
• Not available
• Installed before its effective date
• Missing date information
• Past its expiration date
DATABASE EFFECTIVE STATUS
• Effective upon release
Databases with
no effective
date
• Transfer occurs prior to database verification at system
start-up
• No automatic transfer if Flight Stream 510 is present
• Includes Basemap and Terrain
• No pilot confirmation or restart required
Databases with
specified
effective dates
• Effective during a specific period
• Unit determines database status using the current date
and time from GPS
• Automatic activation occurs on the effective date
DATABASE NOT FOUND
Notifications for databases not present or available also display in the form of system
messages.
Tapping Database Info
opens the Active Database
Information page.
Review this list to determine
the status of the indicated
database.
Database
Not Present
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2-3
Get Started
2.2
Active and Standby Databases
The navigator uses two types of databases: active and standby. Active databases are
in use by the system. Standby databases have not reached the effective date.
During normal operation,
information about all active
and standby databases are
viewable on the associated
info page.
From the Home page, tap System > System Status > Select Active or Standby.
DB INFO PAGE
Active
Standby
DISPLAYS
• Information about databases currently in use
• View Copyrights key
• Information about databases that are not yet effective
The Standby DB Info page notifies when
no standby databases are available.
VIEW COPYRIGHTS
Tapping this key displays copyright information for all
installed databases.
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Get Started
2.3
Manual Updates
FUNCTIONAL LIMITATIONS
The Database Updates page is available only when:
• The aircraft is on ground
• The start-up page is active (i.e., during power up)
2.3.1
Database Updates Page
This page presents a list of all available databases.
To open, tap the Databases key on the start-up page.
1
2
3
DATABASE SOURCE INDICATION
Connext Icon
A Connext icon indicates when a
database is from Garmin Pilot via
wireless transfer.
No indication means the database is either from an SD card or the unit’s internal
standby queue.
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2-5
Get Started
SELECT ALL DATABASES
Select individual databases for transfer, or choose Select All if all
listed databases require updating.
After all selections are made,
initiate the update process by
tapping Start.
By default, this page displays only
the databases recommended for
update.
Basemap and Terrain update automatically and
require no action.
A message notifies when no such
databases are available.
The unit automatically restarts
once all updates are complete.
SHOW ALL DATABASES
Tapping Show All displays a complete list of all databases.
This list may include databases
that are:
• Not yet effective
Error
Icon
2-6
Older
Timestamp
• Older than the currently
active database(s)
• Unable to update due to
an error
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Get Started
ERROR INFORMATION
To determine the cause of a database error, tap Error Info.
An information window provides
details regarding the state of the
database.
SELECT REGION
This key appears when two
databases are of the same type
and cycle, but pertain to different
regions.
To specify a database region, tap
Select Region, then select the
appropriate menu option.
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2-7
Get Started
2.4
Automatic Updates
Automatic updates occur
when:
• A newer database is
detected on the SD card or in
the internal standby queue
• A newer database is within
its effective dates
• The aircraft is on ground
When a newer database is available,
follow the on-screen prompts to
complete the update process.
A status page displays a progress bar
and the name of each database as it
uploads to the unit. Terrain databases
may require up to 5 minutes for
transfer. Total transfer time depends on
the SD card type.
The unit automatically restarts once the update is complete. The update is indicated
in the list of currently installed databases.
INSTALL OR UPDATE A DATABASE USING AN SD CARD
1. Download a database onto an SD card.
2. Insert the SD card with the most recent database(s) into the card slot.
3. Power on the unit.
Selecting Update opens the DB Updates page,
where a list of the newest databases is
available for review.
All newer databases (effective and expired)
transfer from the SD card to the internal
standby queue.
BASEMAP AND TERRAIN UPDATES
These databases automatically transfer from an SD card without any prompting or
progress indications. They do not require pilot confirmation or a unit restart.
2-8
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Get Started
2.5
Database Concierge
FEATURE REQUIREMENTS
• Flight Stream 510 wireless datacard
• Garmin Pilot app on a mobile device
• The aircraft is on ground
Database Concierge allows wireless transfer of databases
from a mobile device while the aircraft is on ground.
A pilot selects and downloads databases inside the
Garmin Pilot app. Transfers occur once Flight Stream 510
establishes a wireless connection inside the aircraft.
Database Concierge Transfer Function
• Provides automatic updates for databases with effective dates
• Preloads databases that are not yet effective by placing them in the internal
standby queue
• Displays database type, cycle, effective date, and transfer progress
• Allows manual operation via Start key
• Requires pilot confirmation
TRANSFER A DATABASE USING DATABASE CONCIERGE
1. Purchase database(s) from flyGarmin.com.
2. Open Garmin Pilot and follow the download instructions.
3. Install Flight Stream 510 and then power on unit.
4. Connect to Wi-Fi.
5. Follow the on screen prompts.
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Get Started
Database Concierge transfers
databases from the app to
Flight Stream 510.
A progress bar shows when this
process is complete.
Database Transfer Status
Database Update Status
The unit either updates or
preloads databases based on
their effective date. A second
progress bar indicates upload
status. The unit automatically
restarts upon database activation.
Tapping Skip cancels any unfinished wireless transfers and
initiates the update process.
The unit activates any databases that completed transfer before the interruption.
Previously selected databases on an SD card or in the internal standby update as well.
The message “Transfers interrupted” displays if no databases are available.
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2.5.1
Wi-Fi Setup
Tapping WiFi Info opens an information page. This page is
accessible from the Database Update and start-up pages.
Information includes:
• Database Concierge
connection status
• Connected device name
• Database update availability
and instructions
• Wi-Fi SSID and password
WI-FI INFO KEY STATUS ANNUNCIATIONS
Wi-Fi connection status annunciates on the key label when the information page is
not active.
Flight Stream 510 requires power up.
Wi-Fi is active, but the unit is waiting to connect with a
device.
Connection complete. Flight Stream 510 requires Garmin
Pilot to be opened in order for database transfer to
commence.
Garmin Pilot opened and streaming to unit.
CONNECT TO WI-FI
Follow the onscreen prompts when connecting to the Wi-Fi network.
1. Install Flight Stream 510 and then power on unit. Observe Wi-Fi status changes
from “Offline” to “Ready.”
2. Tap Wi-Fi Info.
3. Enter the required SSID and password using the provided keypads.
4. Enable Wi-Fi setting on the portable device. Wi-Fi status changes to
“Open App” once pairing is complete.
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Connectivity
Connext works via the Bluetooth data link to provide up-to-date,
wireless information throughout the cockpit.
FEATURE LIMITATIONS
• Unit allows pairing of up to 13 Bluetooth devices, with two simultaneous
device connections
• Auto reconnect function is not available for Android devices
2.6
Connext Setup
The Connext interface allows communication
with applications (i.e., Garmin Pilot) from a
portable electronic device.
Connext Features
The following features are available on your portable electronic device.
• GPS position and velocity information
• Uncorrected barometric pressure altitude used by transponder and ADS-B [1]
• ADS-B In traffic data [2]
• FIS-B weather and flight information [2]
• AHRS data from built-in sensor [3] [4]
[1]
[2]
[3]
[4]
2-12
GNX 375 only.
GNX 375, or GPS 175 with external ADS-B In source.
Attitude data does not output to other installed avionics.
The internal AHRS sensor is only for use with a portable electronic device. All internal AHRS
functions are automatic and do not require pilot action.
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2.7
Bluetooth Setup
The unit supports Bluetooth pairing
with up to 13 portable electronic
devices via the Garmin Pilot app.
Bluetooth Features
• FIS-B weather [1]
• ADS-B traffic [1]
• GPS/WAASposition,velocity,
and time
• Pressure altitude
• AHRS
Bluetooth management options reside
on the Devices page. Opening this page
automatically initiates device pairing.
Device information and pairing mode
status display on the Connext page.
• Magnetic heading
• Flight plan transfer
[1]
2.7.1
GNX 375, or GPS 175 with external ADS-B In source.
Enabling Bluetooth
Tapping Bluetooth Enabled
toggles Bluetooth functionality
on or off.
All associated setting controls and
features are unavailable when this
function is inactive.
DEVICE NAME
Allows entry of the Bluetooth device name. Use the
keypad or control knobs to enter the Bluetooth name.
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2.7.2
Managing Paired Devices
To view a list of all paired devices
and their connection status, tap
Paired Devices.
To enable automatic connection
between the unit and a paired
device at power up, tap
Auto Reconnect.
AUTO RECONNECT
Enables automatic connection between the unit and the paired device when the two
are within range.
REMOVE
Removing a device from the list means it is no longer paired with the unit. This action
requires pilot confirmation.
Be sure to remove pairing on both devices before attempting to pair them again.
CONNECTION STATUS
The device is configured and communicating properly.
The device is not available and is not configured or it is not
communicating properly.
2.7.3
Importing a Flight Plan
This feature allows automatic import of flight plans via
Bluetooth.
It may be necessary to turn this function off if a portable
device application makes repeated erroneous attempts to
send flight plans to the unit.
Once transfer is complete, an
advisory message informs that a
new flight plan is available for
preview.
To view the flight plan,
acknowledge the advisory and
tap Preview.
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XPDR
FEATURE LIMITATIONS
• GNX 375 only
2.8
XPDR Control Panel
Transponder controls are accessible via the XPDR key.
This key is unavailable when the control panel is active.
5
1
2
4
3
1
Squawk Code Entry Field
4
Squawk Code Entry Keys
2
VFR Key
5
Data Field
3
XPDR Mode Key
The XPDR key becomes
available when you:
• Enter a squawk code
• Open the XPDR menu
• View a message
• Select the Mode key
• Leave the control panel
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2.9
XPDR Setup
Tap Menu to access the transponder setup
options. From here you can:
• Change the display of data
• Enable 1090 ES ADS-B Out
functionality (if configured)
• Assign a unique flight ID
2.9.1
Displaying Data
Toggles the data field between pressure altitude and
flight ID.
Pressure Altitude
Flight ID
Displays the active Flight ID.
Unless configured, the
Flight ID is not editable.
Displays the current pressure
altitude.
2.9.2
Enabling Extended Squitter Transmissions
Tapping ADS-B Out allows the transmission of ADS-B Out
messages and position information.
2.9.3
Assigning a Flight ID
FEATURE LIMITATIONS
• Availability dependent on configuration
If the flight ID is editable, tap Flight ID
and assign a unique identifier.
Flight IDs are alphanumeric (upper-case only) and have an eight character limit.
The active flight ID displays by default.
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2.10 XPDR Modes
Tapping Mode opens a menu of the available transponder
modes. Options include Standby, On, and Altitude Reporting.
MODE
Standby
On
Altitude
Reporting
FUNCTION
• Transponder does not reply to interrogations or
transmit ADS-B Out
• Bluetooth functions remain operational
• Unit continues to receive ADS-B In information, but is
not a TIS-B participant
• Transponder replies to interrogations. Replies do not
include pressure altitude
• Reply (R) symbol on the display indicates the
transponder is responding
• Transponder replies to identification and altitude
interrogations
• Reply (R) symbol indicates the transponder is
responding
• GNX 375 transmissions include pressure altitude
During Altitude Reporting mode, all aircraft air/ground state transmissions are
handled via the transponder and require no pilot action. Always use this mode
while in the air and on the ground, unless otherwise requested by ATC.
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2.11 Squawk Code Keys
SPECIAL SQUAWK CODES
1200
Default VFR code (USA)
7500
Hijacking
7600
Loss of communications
7700
Emergency
Eight squawk code entry keys (0 – 7)
provide access to all ATCRBS codes.
Tapping one of these keys begins the
code selection sequence.
Use the Backspace key or outer
control knob to move the cursor.
Digits that are not yet entered appear as underscores.
Activate the new code by
tapping Enter.
To cancel the code entry and exit
the page, tap Cancel.
Active squawk codes remain in use until
a new code is entered.
2.11.1
VFR
Tapping this key once sets the squawk code to the
preprogrammed VFR code.
This code is factory set to 1200, but may be changed during
configuration.
2.11.2
XPDR Key
Active
Transponder
Active Squawk
Code
2-18
Transponder
Mode (On)
Tapping the XPDR key activates
the IDENT function for 18 seconds.
This signal distinguishes the
transponder from others on the air
traffic controller’s screen.
Tapping this key when another
page is active immediately opens
the control panel.
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TRANSPONDER STATUS INDICATIONS
IDENT
Standby Mode
• Reply active
• Standby mode
• IDENT function active
• Current squawk code
(inactive)
• No change to
transponder code
IDENT with New Squawk Code
Altitude Reporting Mode
• Reply active
• Altitude reporting mode
• Transponder code
modified
• Reply active
• Identify function active
• VFR squawk code
(active)
Reply active
IDENT function active
Transponder in operation
Altitude Reporting
Standby
Tap to initiate the IDENT function (code unmodified)
Tap to accept modified code and initiate IDENT function
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2.12 Remote Control
Transponder functions are controllable from a connected G3X Touch display.
Control features include:
• Squawk code
• Transponder mode
• IDENT
• ADS-B transmission
• Flight ID
For transponder control operation, consult the G3X Touch Pilot’s Guide.
2.13 XPDR Alert
If the transponder fails:
• Red “X” displays over the IDENT key
• Advisory message alerts
• XPDR control page is not available
Transponder fail annunciations are designed to be immediately recognizable.
If a failure occurs while the control page is active, the display automatically returns
to the previous page.
UNIT
GNX 375
CONDITION
ADS-B interboard communication failure.
For information regarding pilot response to a transponder failure, consult the
AFMS.
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ADS-B Altitude Reporting
FEATURE REQUIREMENTS
• GDL 88
FEATURE LIMITATIONS
• GPS 175 only
• Display and control functionality dependent on GDL 88 configuration
2.14 ADS-B Control Panel
ADS-B Out controls are accessible via the ADS-B key.
1
2
3
1
Altitude Reporting Status
(from GDL 88)
2
Anonymous Mode Key
GDL 88 Features
• Remote-mount ADS-B
transceiver
• Transmits ADS-B Out
messages to ATC and other
aircraft
• Communicates ADS-B In
data to panel-mounted
avionics for the display of
traffic and weather
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3
Flight ID Key
When interfaced to a GDL 88
transceiver, GPS 175 allows control over
some aspects of the ADS-B Out
message and provides position
information to the GDL 88.
Not all installations allow pilot control
of ADS-B Out transmissions.
For more information, consult the
GDL 88 ADS-B Transceiver
Pilot's Guide.
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2.14.1
ADS-B Key
FEATURE LIMITATIONS
• Functionality dependent upon GDL 88 configuration
Depending on the configuration of your GDL 88, tapping the ADS-B key:
• Reports GDL 88 altitude reporting status
OR
• Allows on/off control of the GDL 88’s altitude reporting function
Active
Transponder
Transponder
Mode (ALT)
“ALT” indicates that the unit is
in altitude reporting mode.
This indication corresponds to
the function status annunciation
on the control panel.
Squawk Code
(as reported by GDL 88)
2.14.2
Enabling Anonymous Mode
FEATURE LIMITATIONS
• Availability dependent on GDL 88 configuration
During anonymous mode, the unit replaces identifying information in the ADS-B Out
message with a temporary randomized number for privacy while providing position
information. Instead of a flight ID, the unit transmits the call sign "VFR."
Tap ADS-B > Anonymous.
The key label changes from “Off” to “Armed.”
Tapping Anonymous again toggles the mode off.
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2.14.3
Assigning a Flight ID
FEATURE LIMITATIONS
• Availability dependent on GDL 88 configuration
If the flight ID is editable, tap Flight ID and assign a
unique identifier. The key is not selectable (read-only) when
the ID is received from the GDL 88.
Flight IDs are alphanumeric (upper-case only) and have an eight character limit.
The active flight ID displays by default.
2.15 GDL 88 Alert
If the GDL 88 fails:
• Red “X” displays over the IDENT key
• Advisory message alerts
• ADS-B reporting functions are not available
Failure annunciations are designed to be immediately recognizable. If a failure
occurs while the control page is active, the display automatically returns to the
previous page.
UNIT
GPS 175
CONDITION
GDL 88 failure.
For information regarding pilot response to ADS-B failures, consult the AFMS.
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Pilot Settings
System customization
options allow you to:
• Set and display the CDI
• Specify runway criteria
• Set the date and time
• Create shortcuts
• Set the display units
• Adjust display
brightness
Other setup options allow
you to monitor time in flight
and create custom reminder
messages. These reside in the
system Utilities.
2.16 CDI Scale
Set the scale for the course deviation indicator. Scale
values represent full scale deflection for the CDI to
either side.
Options: • 0.30 nm • 1.00 nm • 2.00 nm • Auto
Scale selections are reflected in the annunciator bar.
Auto Setting Annunciation
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Manual Setting Annunciation
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CDI scale is set to “Auto” (default). At the default setting, the scale sets to
2.0 nm during the en route phase of flight.
Aircraft is within 31 nm of the destination airport (i.e., terminal area).
The scale linearly ramps down to 1.0 nm over a distance of 1 nm.
Aircraft is leaving the departure airport. The scale is set to 1.0 nm once the
aircraft is over 30 nm from the departure airport. It begins to gradually ramp up to
2 nm when the flight phase changes from terminal (TERM) to en route (ENR).
During GPS approach operations, the scale gradually transitions down to an angular
scale.
Aircraft is 2.0 nm before the final approach fix. Scaling tightens from 1.0 nm to
the angular full-scale deflection defined for the approach (typically 2.0º).
Selecting a lower value (0.3 nm or 1.0 nm) prevents the selection of higher scale
settings during ANY phase of flight. Example: If you select 1.0 nm, the unit uses
this setting for en route and terminal phases, and ramps down further during
approach.
2.16.1
Horizontal Alarm Limits
Horizontal alarm limits (HAL) are used to compare against GPS position integrity.
These protection limits follow the CDI scale, unless the corresponding flight phase
requires a lower HAL. For example, the selected scale setting is 1.0 nm, but full-scale
deflection during approach still follows the approach scale setting (0.30 nm).
FLIGHT
PHASE
CDI SCALE
HORIZONTAL
ALARM LIMIT
Approach
0.30 nm or Auto
0.30 nm
Terminal
1.00 nm or Auto
1.00 nm
En Route
2.00 nm or Auto
2.00 nm
Oceanic
Auto
2.00 nm
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2.16.2
CDI On Screen
Toggling this setting displays the CDI scale on screen.
When active, a CDI with lateral deviation indicator displays
below the GPS NAV Status Indicator key.
CDI OFF
Only the Flight Plan page
access key is available.
Lateral Deviation Indicator
Lateral deviation indications
display when there is an active
flight plan.
2-26
CDI ON
The CDI provides no indications
without an active flight plan.
Visual Approach Guidance
Advisory horizontal guidance
annunciations appear when a
visual approach procedure is
active.
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2.17 Airport Runway Criteria
Specify runway criteria from the System Setup page.
Selections determine which airports are suitable when
using the nearest airport search feature.
During an approach, the terrain alerting algorithm
uses airport runway settings to avoid nuisance alerts.
2.17.1
Runway Surface
Runway Surface Options
• Any
• Hard/Soft
• Hard Only
• Water
2.17.2
Tap Runway Surface and then select
the runway surface type.
Selecting “Any” allows all surface types
to display on the map.
Minimum Runway Length
Specify a minimum runway length to:
• Exclude airports with shorter runways from the nearest airport list
• Inform the terrain function of which airports are available for use, so that
terrain alerts do not generate when landing at one of these airports
Typing “0” allows runways of any length to display on Map, appear in the nearest
airport list, and be considered for use by Terrain.
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2.18 Clocks & Timers
2.18.1
Timers
Monitor time in flight using three available timer types.
Timer settings are accessible via the Utilities
menu page. Toggle between timer types
using the provided display key.
Clock/Generic Timer
Trip/Departure Timers
Stopwatch style counter.
Count up or count down.
Specify countdown time
using the preset function.
Measure elapsed airborne time
since the last ground-to-air
transition. Set timer to start at
unit power up or once the
aircraft is in air.
Controls:
Controls:
• Direction (Up, Down)
• Criteria (Power On, In Air)
• Start • Stop • Timer Preset
• Reset Timer
2.18.2
Clock
Specify the time format and local offset. Settings
reside in the System Setup page.
Format options include 12 hour, 24 hour, and UTC.
If a 12 hour or 24 hour clock is selected:
Tap Local Offset > Specify the appropriate offset value from UTC.
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2.19 Page Shortcuts
A knob shortcut option allows you to customize slots 2 and 3 of
the locater bar. Slot one is reserved for the Map page.
Tap a slot key and assign a page to that slot.
Depending on configuration, Traffic
and Weather shortcuts may not be
available.
Page Shortcut Options
• Traffic
• Terrain
• Nearest
Airport
• Weather
• Flight Plan
Verify shortcut operation once
complete.
Tapping Restore Defaults returns both slots to their default
settings (Terrain for Slot 2, Nearest Airport for Slot 3).
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2.20 Alerts Settings
Airspace alerts generate a message. They rely on three-dimensional
data (altitude, latitude, and longitude) to avoid nuisance alerts.
FEATURE LIMITATIONS
• Alert altitudes are dependent on aircraft and airspace altitudes and the
pilot-specified altitude buffer value
Control keys allow you to select which airspace boundaries
generate an alert annunciation upon entry.
Alert boundaries for controlled airspace are
sectorized to provide complete information
on any nearby airspace.
Alert settings do not alter the depiction of
airspace, nor do they change Smart Airspace
settings on the Map page.
With the exception of Altitude Buffer,
airspace alert options are on/off only.
Airspace alerts for Prohibited airspace
cannot be disabled.
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2.21 Unit Selections
Customize the display unit settings. Tapping a parameter key
opens a menu of the available unit types.
PARAMETER
Distance/Speed
Temperature
SETTINGS
• Nautical Miles (nm/kt)
• Statute Miles (sm/mph)
• Celsius (ºC)
• Fahrenheit (ºF)
• Magnetic (º)
NAV Angle
• True (ºT)
• User (ºU)
Magnetic
Variation
• Specify number of degrees for east or west (ºE, ºW)
• Available only when “User (ºU)” is the active
NAV angle
SPECIFY UNIT TYPE
1. Review the current unit selections.
2. Tap the applicable parameter key.
3. Select a unit type.
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2.22 Display Brightness Control
Depending on configuration, display brightness is controlled using
inputs from the built in photocell, aircraft dimmer bus, or both.
2.22.1
Automatic Brightness Control
Dimming is limited to prevent on screen indications from becoming unreadable. The
built in photocell automatically controls display brightness based on ambient light
levels.
Backlight
Intensity Level
Manual Offset
Indicator
During automatic control, the pilot
may still adjust brightness using
the manual offset controls in the
Backlight page.
The unit retains manual offset
settings over power cycles.
Decrease
Backlight
2.22.2
Increase
Backlight
Manual Brightness Control
Optionally, the unit is configurable to use an aircraft dimming bus for display
brightness control. Upon reaching minimum input level, display brightness reverts to
the photocell. This prevents the display from going black in the event of a dimmer
input failure.
Installer configured curves determine the amount of change in brightness that
occurs in response to a control adjustment.
If brightness control is not satisfactory, contact a Garmin dealer to adjust the
lighting curves.
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2.23 Scheduled Messages
Create custom reminder messages and set when they will display.
Allows one time, periodic, and event-based message types.
Active reminders appear at the top of
the scheduled message list. This list is
accessible via the Utilities menu page.
Examples: • “Call FBO” • “Close flight
plan” • “Switch fuel tanks”
CREATE A REMINDER MESSAGE
1. Tap Create Scheduled Message.
2. Specify the message type, content, and countdown timer value.
2.23.1
Message Types
TYPE
DISPLAYS...
One time
When the timer expires, or following each power cycle until
message deletion.
Periodic
After a specified duration of time. Countdown repeats once
the message displays.
Event
According to a specified date and time. Message timer not
applicable.
2.23.2
Modifying Scheduled Messages
Once created, these messages may be modified at any time. Selecting a scheduled
message opens an options menu.
EDIT MESSAGE
This function is accessible from either the Scheduled Messages page or the system
message list.
RESET TIMER
Restarts the countdown timer.
DELETE MESSAGE
Confirming this request removes the selected message from the list.
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Status Indications
2.24 Alert Types
The unit generates annunciations in response to various conditions that may occur.
These abbreviated messages are grouped according to the level of urgency and
required response. They display in order of priority, from highest to lowest.
1. Warnings
2. Cautions
3. Mode & function advisories
WARNINGS & CAUTIONS
Warnings require immediate attention. Cautions indicate the presence of an
abnormal condition that may require pilot action. A warning may follow a caution if
no attempt is made to correct the condition (e.g., altering the aircraft’s path toward
the alerted terrain or obstacle).
MODE & FUNCTION ADVISORIES
Advisories provide status and operating information.
System advisories. These display on a dedicated message list. Depending on the
number of advisories, this list may be scrollable.
Function or mode specific advisories. These appear as unobstructed
annunciations in the annunciator bar.
1
2
3
Advisory Messages & Annunciations
1
System Messages List
2
Message Key
3
Mode Advisory Annunciation
For a complete list of all system-related advisories, refer to section 6
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2.24.1
Alert Annunciations
Alert annunciations are abbreviated messages that indicate an alerted function or
mode. The color of the annunciation depends on the alert type.
• Warnings display in white text on red
background
ALERT COLORS
WARNING
CAUTION
ADVISORY
• Cautions display in black text on amber
background
• Function or mode specific advisories display in
black text on white background
When an alert is triggered, the annunciation flashes by alternating text and
background colors. It turns solid after five seconds. All annunciations remain active
(solid) until the condition is resolved or no longer a threat.
ANNUNCIATION LOCATION
Alerts and informational advisories annunciate in the annunciator bar along the
bottom of the screen.
Alerts, Inhibits
and Test Mode
Advisories
Flight
Phase
From/To
Procedure
Waypoint and
Power Off
Advisories
Annunciator Bar
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2.24.2
Pop-up Alerts
If a warning or caution relating to terrain or traffic occurs, a pop-up window may
display. These pop-ups only appear if the alerted function’s associated page is not
active.
Each pop-up alert provides:
Pop-up Alert Priority
In the event of simultaneous
alerts, pop-up windows display
in the following order:
1. Terrain alerts
• Threat indication
• Alert annunciation
• Option to inhibit or mute the alert
• Control for closing the pop-up window
• Direct access to the associated page
2. Traffic alerts
1
4
2
5
3
Pop-up Alert Layout
1
Threat Indication
4
Alert Inhibit Key
2
Close Pop-up Window Key
5
Go to <Page> Key
3
Alert Annunciation
To open the indicated page, tap Go to <Page>.
To acknowledge the alert and return to previous page view, tap Close.
2.24.3
Aural Alerts
FEATURE LIMITATIONS
• GNX 375 only (traffic alerts)*
• Mute alert function is applicable only to the active aural alert
(does not mute future alerts)
Traffic alerts are accompanied by an aural voice message.
Voice gender is configured during installation.
A Mute Alert key allows you silence the active traffic alert
voice message.
* GPS 175 systems interfaced to a traffic system (GDL 88 or GTX 345): Aural alerts are available.
They are provided directly from the traffic system LRU to the audio panel.
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2.25 System Status Page
View information specific to the unit and its software. Refer here
when contacting customer service.
DATA FIELDS
CONTROLS
• Serial number
Database Info access keys:
• Active
• System ID
• Main software version
• Standby
• GPS/WAAS software version
• Transponder software version
(GNX 375 only)
For more about active and standby
databases, refer to section 2.2.
2.26 GPS Status Page
Monitor GPS receiver performance, establish a baseline for normal
system operation, and troubleshoot weak or missing signal issues.
This page provides a visual reference of GPS receiver functions, including:
• Current satellite coverage
• GPS solution and receiver status
• Phase of flight
• Position accuracy
• Present position
(latitude and longitude)
SKY VIEW DISPLAY
• Depicts satellites currently in view as well as their
respective positions
• Outer circle represents the horizon
(with north at the top of the circle)
• Inner circle represents 45° above the horizon
• Center point shows the position directly overhead
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SIGNAL STRENGTH INDICATIONS
Satellite SVIDs
Each bar is labeled with the SVID
of the corresponding satellite.
Numbers vary according to
satellite type.
• GPS: 1 to 31
• SBAS: 120 to 138
A graph shows GPS signal strength for up
to 15 satellites. As the GPS receiver locks
onto satellites, a signal strength bar appears
for each satellite in view.
Graph symbols depict the progress of
satellite acquisition. Some data may not
display until the unit has acquired enough
satellites for a fix.
SYMBOL
CONDITION
Not present
Receiver is searching for the indicated satellites.
Gray bar, empty
Satellite located.
Gray bar, solid
Satellite located, receiver is collecting data.
Yellow bar, solid
Data collected, but satellite is excluded from position
solution (i.e., it is not in use).
Cyan bar,
cross-hatch
Satellite located, but FDE excludes it for being a faulty
satellite.
Cyan bar, solid
Data collected, but receiver is not using satellite in the
position solution.
Green bar, solid
Data collected, satellite in use in the current position
solution.
D (inside bar)
Differential corrections are in use (e.g., WAAS).
2-38
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Get Started
POSITION ACCURACY FIELDS
LABEL
POSITION DATA
EPU
Estimated Position Uncertainty
HDOP
Horizontal Dilution of Precision
HFOM
Horizontal Figure of Merit
VFOM
Vertical Figure of Merit
EPU is the horizontal position error estimated by the
fault detection and exclusion algorithm, in feet or
meters.
Information fields indicate the
accuracy of the position fix.
HFOM and VFOM values
represent 95% confidence levels
in horizontal and vertical
accuracy.
Lower values mean higher
accuracy. Higher values are the
least accurate.
FDE PREDICTION
NOTE
Under FAR parts 91, 121, 125, and 135, FDE must be used prior to all
oceanic or remote area flights using the GPS 175/GNX 375 as a primary
means of navigation.
This program uses an algorithm to predict FDE availability. If the unit has not been in
operation for more than six months, acquiring satellite data to establish almanac and
satellite orbit information may take 5 to 10 minutes.
2.26.1
Circle of Uncertainty
FEATURE LIMITATIONS
• Available only when the aircraft is on ground
• Displays only on the Map page
Circle of
Uncertainty
• Depicts area surrounding the ownship when GPS
cannot accurately determine aircraft location
• Expands as GPS horizontal accuracy degrades
• Shrinks as accuracy improves
• Translucent with minor shading so as not to
obstruct other features
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
2-39
Get Started
2.26.2
SBAS Providers
NOTE
Operating with SBAS active outside of the service area may cause elevated
EPU values to display on the status page. Regardless of the EPU value
displayed, the LOI annunciation is the controlling indication for
determining the integrity of the GPS navigation solution.
SBAS supports wide area or regional augmentation through the
use of additional satellite broadcast messages.
Tap this key and select from the list of providers.
PROVIDER
SERVICE AREAS
EGNOS
Most of Europe and parts of North Africa.
GAGAN
India
MSAS
Japan only.
WAAS
Alaska, Canada, the 48 contiguous states,
and most of Central America.
2.26.3
GPS Status Annunciations
Once the GPS receiver determines the aircraft’s position, the unit displays position,
altitude, track, and ground speed data. GPS status annunciates under the following
conditions.
ANNUNCIATION
CONDITION
Acquiring
GPS receiver uses last known position and satellite orbital
data (collected continuously from satellites) to determine
which satellites should be in view.
3D Nav
3-D navigation mode. GPS receiver computes altitude
using satellite data.
3D Diff Nav
3-D navigation mode. Differential corrections from SBAS
provider are in use.
LOI
Satellite coverage is insufficient to pass built-in integrity
monitoring tests.
2-40
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Get Started
2.26.4
GPS Alerts
The following alert conditions can affect GPS accuracy.
INDICATIONS
Yellow “LOI”
annunciation.
FAULT TYPE
Loss of Integrity
CONDITION
Integrity of the GPS position does
not meet the requirements for the
current phase of flight. Occurs
before the final approach fix
(if an approach is active).
Aircraft is after the final approach
fix and GPS integrity does not meet
the active approach requirements.
Unit invalidates
active course
guidance.
Annunciation is
specific to cause.
Loss of Navigation
Insufficient number of satellites
supporting aircraft position (i.e.,
more than 5 seconds pass without
adequate satellites to compute a
position).
GPS sensor detects an excessive
position error or failure that cannot
be excluded within the time to
alert.
On-board hardware failure.
Yellow “No GPS
Position”
annunciation.
Ownship icon not
present
190-02207-02 Rev. B
Loss of Position
Unit cannot determine a GPS
position solution.
GPS 175/GNX 375 Pilot’s Guide
2-41
Get Started
2.27 ADS-B Status Page
View last uplink time and GPS source information.
FEATURE REQUIREMENTS
• GDL 88 or GTX 345 ADS-B transceiver (GPS 175 only)
OR
• GNX 375
UPLINK TIME
TEXT
COLOR
Green
Yellow
MINUTES SINCE
LAST UPLINK
<5
This field displays the number of minutes
since last uplink. Digital values may
change color depending on duration.
“> 15” displays when the time exceeds
15 minutes.
5 to 15
Dashes indicate when valid uplink data is
unavailable (e.g., the device is offline).
> 15
FIS-B WX STATUS
Tap this key to view the status of FIS-B weather products.
This page is also accessible from the FIS-B Weather setup
menu.
TRAFFIC APPLICATION STATUS
Tap this key to view the status of the three traffic
applications: • AIRB • SURF • ATAS (airborne alerts)
ANNUNCIATION
DESCRIPTION
On
Application is running. Required ownship data is
available and meets the performance criteria.
Available to Run
Application is configured. Required input data is
available and meets the performance criteria.
Unavailable to Run
Required input data is not available due to a failure
(e.g., aircraft surveillance application process failed).
Unavailable - Fault
Required input data is available, but does not meet
the performance criteria or is not available due to
non-computed data conditions.
2-42
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Get Started
Logs
2.28 Export to SD Card
A logging function stores WAAS diagnostic and ADS-B traffic data
(GNX 375 only) in the unit’s internal memory. This information is
available for export to an SD card for later analysis.
FEATURE REQUIREMENTS
• SD card
FEATURE LIMITATIONS
• ADS-B traffic data logging available on GNX 375 only
To export a diagnostic log:
1. Insert an SD card.
2. Navigate to the Logs page.
3. Select WAAS Diagnostic Log or ADS-B Log.
If no log files are present, these keys are not available.
WAAS Diagnostic Log Functions
• Generates log files automatically upon unit power-up
• Overwrites oldest file when the internal log reaches capacity
• Exports to the “log_files” folder on the SD card
ADS-B Log Functions (GNX 375 only)
• Generates log files automatically upon unit power-up
• Overwrites oldest file when the internal log reaches capacity
• Exports to the “log_files” folder on the SD card
ADS-B log files may take several minutes to export.
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GPS 175/GNX 375 Pilot’s Guide
2-43
INTENTIONALLY LEFT BLANK
2-44
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Navigation
3
Navigation
MAP
3.1
3.2
3.3
Map Setup ............................................................................................3-6
Map Interactions .................................................................................3-13
Map Overlays ......................................................................................3-19
ACTIVE FLIGHT PLAN
3.4
3.5
3.6
3.7
3.8
3.9
3.10
3.11
3.12
Collapse All Airways ............................................................................3-28
OBS .....................................................................................................3-28
Dead Reckoning ..................................................................................3-30
Parallel Track .......................................................................................3-31
Edit Data Fields ....................................................................................3-33
Flight Plan Catalog ..............................................................................3-33
Create a Flight Plan..............................................................................3-36
Flight Plan Map Overlay .......................................................................3-38
GPS NAV Status...................................................................................3-39
DIRECT TO
3.13
Direct To Basics ...................................................................................3-40
WAYPOINTS
3.14
3.15
3.16
3.17
Waypoint Information..........................................................................3-45
Waypoint Selection..............................................................................3-48
Create User Waypoints ........................................................................3-51
Nearest................................................................................................3-55
PROCEDURES
3.18
3.19
3.20
3.21
Flight Procedure Basics.........................................................................3-58
Departures ..........................................................................................3-62
Arrivals ................................................................................................3-64
Approaches .........................................................................................3-66
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
3-1
Navigation
NAVIGATION
APPS & FUNCTIONS
Menu selections vary based on features and optional equipment installed with
Garmin avionics.
[1]
3-2
NEXRAD and Terrain overlays are mutually exclusive.
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Navigation
Map
To increase situational awareness, Map depicts the aircraft’s current
position relative to land, aeronautical, weather, and traffic
information.
FEATURE REQUIREMENTS
• Active GPS source (aircraft position symbol)
• UAT receiver (FIS-B weather)
FEATURE LIMITATIONS
NEXRAD and terrain overlay functions are mutually exclusive. Enabling one
automatically disables the other.
6
5
4
7
3
8
2
9
1
Default Map Features
1
Aircraft Symbol
Depicts current aircraft position and orientation.
• Tip represents actual aircraft location
• Symbol type is dependent upon configuration
• Absent if a GPS source is not available
2
Track Vector
Current ground track indication.
3
Basemap
Presents a graphical depiction of land and water data.
4
User Field
Customizable data field appearing in each corner of the map. By default,
these display: distance, track, ground speed, and desired track
5
NAV Range Ring
Displays current direction of travel on a rotating compass.
Orientation: Magnetic north
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
3-3
Navigation
6
Map Range Indicator
Displays current map range in the upper left quadrant of the range ring
(i.e., the distance from the aircraft to the range ring).
7
North Indicator
Indicates True north.
Page Orientation Label
• North Up orients map to True north.
8
• Heading Up orients map to current aircraft heading (requires
heading data source interface).
• Track Up orients map to current aircraft GPS track.
9
Map Overlay Icons
Indicates status of overlays at the current map range.
Includes: obstacles, power lines, precipitation, terrain, and traffic
AUTOMATIC ZOOM
AIRCRAFT DEFAULT
STATE
ZOOM
Ground
0.50 nm
Air
10.0 nm
Map remembers the last zoom range for each
aircraft state, and automatically resumes this
view when the aircraft transitions between air
and ground states.
FEATURE LABELS
To maintain readability, map feature labels remain uniform at all zoom levels.
TRAFFIC UNITS
System Units page selections do not affect the display of traffic on Map.
3-4
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Navigation
LAND AND WATER DEPICTIONS
Land and water data are for general reference only. Data accuracy is not suitable for
use as a primary navigation source. The information is intended to supplement and
not replace official government charts and notices.
DATA DRAWING ORDER
The electronic map draws data in order of priority, from highest (1) to lowest (39),
with higher priority features drawn atop those of lower priority.
LEVEL
FEATURE
LEVEL
FEATURE
1
Traffic
14
Surface Conditions
2
Ownship
15
Airspace
3
Flight Plan
16
Waypoints
4
Terrain-FLTA
17
Airways
5
Point Obstacles
18
Reference Grid
6
Line Obstacles
19
Radar Coverage
7
TFR
20
NEXRAD
8
METAR
21
SafeTaxi
9
Winds Aloft
22
Runways
10
SIGMET
23
Terrain
11
AIRMET
24
Basemap
12
PIREP
25
Topo
13
AIREP
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
3-5
Navigation
3.1
Map Setup
Map setup options allow you to customize
the display of aeronautical information.
Tap Menu when you need to:
• Change map orientation settings
• Configure user fields
• Adjust the map detail level
• Enable map overlays
• Select a NEXRAD source
• Filter airspace data according to
altitude
• Specify airway types and range values
• Expand the forward-looking view for
improved situational awareness
RESTORE MAP SETTINGS
With the exception of user fields, this key
restores all original factory map settings.
[1]
[2]
3-6
On/off functionality only.
NEXRAD and Terrain overlays are mutually exclusive.
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Navigation
3.1.1
Configure User Fields
Default User Fields
• DIS - Distance
• TRK - Track
Displays Map in configuration mode,
allowing you to customize the display
of data in each corner of the Map
page.
• GS - Ground Speed
• DTK - Desired Track
User fields are useful during time
sensitive and work load intense
phases of flight.
In configuration mode:
• All four data fields change to
selectable keys
• All other map elements are
inactive
Tap any key and select from the list of available data types.
Displayed units change based on selection.
Selecting “OFF” removes the
corresponding user field from the
map page.
User Field
Absent
Tapping Restore User Fields returns all fields to their
default settings and removes the TOPO scale if present.
For convenience, Map user fields may be toggled on and
off by pushing the control knob.
Fields remain hidden when you use the knob shortcut to
move between Map and the Active FPL page. They
reappear in their respective corners when you return to
the Home page or use the knob to move between Map
and any other application.
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
3-7
Navigation
LABEL
FIELD TYPE
LABEL
FIELD TYPE
BRG
Bearing to waypoint
MSA
Minimum safe altitude
DIS/BRG
APT
Distance/bearing from
destination airport (i.e.,
the straight line distance)
OAT (static)
Outside static air
temperature
DIS
Distance to waypoint
OAT (total)
Outside total air
temperature
DIS to Dest
Distance to destination
(i.e., the distance along
the flight plan)
Time
Current time
DTK
Desired track
Time to
TOD
Time to top of descent
ESA
En route safe altitude
TKE
Track angle error
ETA
Estimated time of arrival
Trip Timer
Timer display
ETA at Dest
ETA at destination
TRK
Track
ETE
Estimated time en route
VSR
Vertical speed required
ETE to Dest
ETE to destination
Wind
Wind speed and direction
Generic
Timer
Timer display
XTK
Cross track error
GS
GPS ground speed
OFF
Do not display data field
GSL
GPS altitude
“Destination” refers to the missed approach point (if an approach is loaded) or
the final airport in the flight plan.
3.1.2
Map Orientation
Sets the orientation of the map display.
Options include North Up, Track Up, or Heading Up.
Label below the North indicator shows the current orientation.
This label is absent when the info banner is active.
North Up is useful when zoomed out to view the entire route or a frontal system
on a NEXRAD display.
3-8
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Navigation
3.1.3
North Up Above
Sets the range at which map orientation changes to North Up.
Using the North Up Above feature causes the screen to switch at certain zoom
levels. This is useful as a shortcut to quickly increase situational awareness.
3.1.4
Visual Approach
Sets the distance from the
destination airport at which the
Visual Approach selector key
becomes active.
Visual Approach
Key
To reduce page clutter, the key moves to the upper
left corner of the display when the info banner is
active.
3.1.5
TOPO Scale
Displays a topographical elevation
scale. To remove the scale:
• Toggle TOPO Scale off
OR
• Tap Restore User Fields
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
3-9
Navigation
3.1.6
Range Ring
Provides a more precise indication
of distance between the aircraft
and map objects.
3.1.7
Track Vector
FEATURE LIMITATIONS
• Indication absent when aircraft velocity is < 30 kt
Indicates the current ground track.
Arrow tip represents aircraft position
at the specified time interval
(if the aircraft maintains current
ground track during that time).
Track vector length options display as a dashed line and arrow extending from
the aircraft icon, showing current track and distance the aircraft will travel in the
selected time.
If the track vector is placed over a point on the map, and no data is entered into
the system, the unit indicates a wind-corrected GPS track to that point. This is
useful for intercepting airways and radials, making small but positive lateral
corrections during approaches, and in setting up for arrivals in the terminal area.
3.1.8
Ahead View
FEATURE LIMITATIONS
• Not available when page orientation is North Up
Repositions ownship near the
bottom of the page to expand the
view ahead.
3-10
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Navigation
3.1.9
Map Detail
Changes to the map detail level take effect immediately. Options include:
• Full
• High
FEATURE
• Medium
FULL
HIGH
• Low
MEDIUM
LOW
Small Cities
Medium Cities
Large Cities
Freeways
Highways
Roads
Railroads
Basemap Labels
VORs
NDBs
Line Obstacles
Point Obstacles
Airspaces that are not
prohibited or restricted
Waypoints
SafeTaxi
Restricted Airspaces
Prohibited Airspaces
Present
190-02207-02 Rev. B
Removed
GPS 175/GNX 375 Pilot’s Guide
3-11
Navigation
AVIATION DATA SYMBOLS
Non-towered,
non-serviced airport [1]
Non-towered, serviced
airport [1]
Towered, non-serviced
airport [1]
Towered, serviced airport
[1]
Soft surface, non-serviced
airport
Soft surface, serviced
airport
Restricted (private) airport
Unknown airport
Heliport
ILS/DME or DME only
Intersection
LOM
NDB
TACAN
VOR
VOR/DME
VORTAC
VRP
Runway extension
[1] Symbol depicts orientation of longest runway.
LAND DATA SYMBOLS
3-12
Railroad
National Highway
River/Lake
Freeway
State/Province Border
Small City
Local Road
Medium City
Local Highway
Large City
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Navigation
3.2
3.2.1
Map Interactions
Basic Interactions
Typical map interactions include zoom, pan, and object selection.
PAN & ZOOM
Panning allows movement of the map in any direction without change to the current
zoom setting. Zooming adjusts the current magnification level between pre-defined
range parameters.
Maximum Scale
Value
Before flight, consider which
map scales are best for achieving
the desired level of detail and
map information.
Generally, use smaller map
scales in and around terminal
areas and whenever precise
navigation is required (e.g.,
airway or radial intercepts).
During cruise flight, increase the
map scale to better balance
navigation, situational
awareness, and decision
making.
Minimum Scale
Value
OBJECT SELECTION
Tapping any object or location on the map displays a map pointer and an information
banner.
MAP POINTER
This symbol indicates point of contact on the map. A gray circle
highlights any selected waypoint or obstacle.
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
3-13
Navigation
MAP INFO
Selected Airport
Available information and
controls are dependent upon
object or location type and
proximity to other objects.
Selecting an airport icon displays the airport’s highest
field elevation. A map pointer icon corresponds with
the touch point on the map.
An information page access key displays when you
select a waypoint, airspace, airport, airport surface
hot spot, or TFR.
DATA FIELDS
CONTROLS
• Pan mode annunciation
• Map Pointer/Create Waypoint
• Bearing and distance from current
aircraft position to map pointer
• Graphical Edit
• Location elevation
• Associated information page
access key, if applicable
• Maximum altitude AGL and MSL
for obstacles
• Next (for stacked objects)
STACKED OBJECTS
To move the selector through each object in proximity of the map
pointer, select an object and tap Next.
Overlapping objects may
be difficult to identify at
a given zoom level.
Stack
Active
Selection
3-14
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Navigation
AIRSPACE INFO
Selected Airspace
When selected, active airspace
boundaries change color.
Tapping Airspace Info opens
the associated information
page.
Data fields display information
specific to the selected airspace.
Available controls reside along
the bottom of the page.
DATA FIELDS
CONTROLS
• Airspace name and type icon
• ATC entity responsible for the
airspace, if applicable
• Floor and ceiling altitudes
• Proximity to airspace
3.2.2
• Frequencies: View a list of all
related radio frequencies
• Preview: View the airspace
boundary and a 2-D map of the
surrounding area
Graphical Flight Plan Editing
FEATURE LIMITATIONS
• Parallel track offsets do not apply to the temporary flight plan
Graphical editing allows quick changes to the active flight plan
from the map display.
Map provides identifier keys for
selecting waypoints that are
stacked or in close proximity. If the
displayed options are not preferred,
tap away or select Cancel.
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
3-15
Navigation
TEMPORARY FLIGHT PLAN BANNER
An information banner displays waypoint selections made during graphical edit
mode. All selections become active once you tap Done.
Lists up to four waypoint
identifiers
Ellipse indicates additional waypoints
Initial waypoint in flight plan always appears first
Tapping Undo reverses the last edit. You may undo up to nine of
the most recent actions.
On the map, dragging and releasing the leg away from any
waypoints removes it from the temporary flight plan.
To exit edit mode without saving changes, tap Cancel.
ADD WAYPOINT TO AN EXISTING LEG
You can edit, add, or omit flight
plan legs by tapping or dragging
your finger directly on the map.
Existing
Leg
Selected Waypoint
1. Tap any location on the
map.
2. Tap Graphical Edit.
3-16
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Navigation
3. Tap and drag the leg to a
new waypoint or airway,
then release.
The temporary flight plan
adjusts to show the new route.
If no other edits are necessary,
tap Done.
The new waypoint now appears
in the active flight plan.
Delete any existing flight plan before attempting to graphically edit a direct-to
waypoint. Map does not allow the addition of an intermediate waypoint
between the current position and a direct-to waypoint unless the waypoint is in
the flight plan.
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
3-17
Navigation
REMOVE WAYPOINT FROM FLIGHT PLAN
You can tap and drag any leg to
another waypoint or airway, or
release it away from any
waypoint if an alternate
destination is not preferred.
CREATE LEGS WITHOUT AN EXISTING FLIGHT PLAN
If an active flight plan does
not exist, you can graphically
create one without ever
leaving the Map page.
1. Tap any location on the map > Graphical Edit.
2. Begin tapping waypoints to add them to the temporary flight plan.
3. Tap Done.
3-18
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Navigation
3.3
Map Overlays
Overlay data controls reside in the Map
menu. Changes to an overlay setting
take effect immediately.
Overlay Selections
• TOPO
• TFR
• Terrain
• Airspaces
• Traffic
• Airways
• NEXRAD
• Obstacles &
Wires
• METAR
3.3.1
NEXRAD and Terrain overlays are
mutually exclusive. Enabling one
automatically disables the other.
Weather product and traffic overlays
are optional on GPS 175. They are
available only when configured for
ADS-B In equipment.
Overlay Controls
Control keys enable the specified overlay function only and
do not activate interfaced equipment. Control keys remain
active even in the absence of required data.
Overlay controls reside in the Map menu.
TOPO
• Overlays topographical data
and ground elevation scale
• Depictions are similar to a VFR
sectional
• Pilot-selectable topographical
elevation scale available
TERRAIN
• Overlays terrain map data
• Color shading depicts terrain
elevation relative to the
aircraft’s altitude
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
3-19
Navigation
TRAFFIC
• Overlays traffic information
• Filter selection on the Traffic
page determines altitude range
• Feature optional for GPS 175
NEXRAD
• Overlays datalink precipitation
weather information
• Options include: CONUS,
Regional, or off (none)
• Feature optional for GPS 175
METAR
• Overlays graphical METARs
• Tapping flag icon displays
information on current and
forecast conditions
• Available only in areas covered
by the active navigation
database
• Feature optional for GPS 175
TFR
• Overlays graphical TFRs
• Tapping this airspace symbol
displays details regarding the
restricted area
• Feature optional for GPS 175
3-20
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Navigation
AIRSPACES
• Overlays airspace boundaries
with altitude labels
• Filter selection determines
altitude range
AIRWAYS
• Overlays the selected airway
type(s) with identifier labels
• Options include: low, high, all,
or off (none)
• High altitude airways are green,
low altitude airways are gray
OBSTACLES & WIRES
• Overlays obstacle and wire data
• Color shading depicts an
object’s elevation relative to the
aircraft’s altitude
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
3-21
Navigation
3.3.2
Overlay Status Icons
Icons indicate which overlays are present at the current map range. A crossed out
icon means the overlay is active, but data is unavailable due to a failure, test, or
standby condition (where relevant).
The absence of an overlay icon means one of two possible conditions:
1. Overlay not present at the current detail level or zoom setting.
2. Overlay control is off.
3-22
METAR
NEXRAD
Obstacle
Power Line
TFR
Traffic
Terrain
Data not available
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Navigation
3.3.3
Smart Airspace
Garmin’s Smart Airspace feature
automatically de-emphasizes
non-pertinent airspace away from
the aircraft’s current altitude.
When an airspace’s vertical
proximity to the aircraft is
>1,000 ft:
Smart Airspace Off
Non-pertinent
Airspace
• Its boundary becomes
transparent
• All associated altitude labels
turn gray
This range increases linearly to
2,000 ft as the aircraft ascends to
10,000 ft.
Smart Airspace On
SMART AIRSPACE CRITERIA
AIRCRAFT
ALTITUDE
AIRSPACE PROXIMITY
TO AIRCRAFT [1]
Sea level
>1,000 ft
>10,000 ft
2,000 ft
[1] Vertical distance above and below aircraft altitude.
AIRSPACE DATA SYMBOLS
190-02207-02 Rev. B
Class B Altitude
Label (ceiling/floor)
Class C/TCA
Class C Altitude
Label (ceiling/floor)
Class D
Class D Altitude
Label (ceiling only)
Restricted/Prohibited
TFR
MIL
Class B/TMA
Other/ADIZ
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Navigation
3.3.4
SafeTaxi
SafeTaxi provides greater map detail
and higher image resolution at lower
zoom levels.
Feature labels denote:
• Runways
• Taxiways
• Airport landmarks
SafeTaxi Features
• Airport diagram overlay that includes hot spot information
• Aircraft position relative to taxiways, runways, and airport landmarks
• Pilot selectable range options
SAFETAXI DATA SYMBOLS
3-24
Runway
Taxiway
Helipad
Construction Area
Airport Beacon
Unpaved Parking
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Navigation
HOT SPOTS
SafeTaxi hot spots identify locations on an
airport surface where positional confusion
or runway incursions are likely to occur.
These known problem areas require
heightened attention by pilots.
Selecting the border of a hot
spot displays a brief summary of
the indicated hazard and an
information key.
Tapping this key provides additional location information.
Numbering corresponds to a list on the airport diagram.
The following airport features
may be deemed hot spots by
aviation authorities.
• Intersecting taxiways and
runways
• Complex ramp areas
• Directional limitations
• Limited wing-tip clearance
• Overflight risk
CONSTRUCTION SPOTS
There are no expanded detail keys or notes
associated with construction areas.
Construction Area Border
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Navigation
Active Flight Plan
Current flight plan information displays as a scrolling list on the
Active Flight Plan (FPL) page.
FEATURE REQUIREMENTS
• Active flight plan
FEATURE LIMITATIONS
• Displays up to 100 waypoints for an active flight plan
2
1
7
3
6
4
5
Active Flight Plan Page
3-26
1
Selectable Data Field Columns
5
Add Waypoint Key
2
Waypoint Identifier Column
6
Leg Data
3
Active Leg Indicator
7
Waypoint Type Icon
4
Current Waypoint
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Navigation
AIRPORT INFO
Procedure
Header
Airport Info
Key
For convenience, airport
information is directly accessible
from the procedure header.
This includes airports specified
in active approaches, arrivals,
and departures.
Tap Airport Info to open the
corresponding information
page.
FIX TYPE INDICATIONS
LABEL
FIX TYPE
iaf
Initial Approach Fix
faf
Final Approach Fix
map
Missed Approach Point
mahp
Missed Approach Hold Point
-p
Parallel Track (no fix)
When applicable, labels indicate
the fix type associated with an
identifier.
ACTIVE LEG STATUS INDICATIONS
Symbols denote active leg status on the GPS NAV indicator. Fix type symbols
(e.g., FAF, MAP) correspond with labels appearing on the flight plan.
IAF
Arc Left
FAF
Holding Pattern
(Right Turns)
MAP
Holding Pattern
(Left Turns)
MAHP
Right Arrow
Parallel Track
Direct To
Arc Right
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Navigation
3.4
Collapse All Airways
Airways automatically display as flight plan legs. A single airway may contain
numerous legs. Airways without an active leg collapse for simplification.
This does not affect airway legs shown on the external navigator(s).
Airway Indication
All airways begin with
an indicator field and
end with an exit
identifier.
Expanded Airway
Detail
To hide all waypoints
along an airway, but
not the airway’s exit
waypoint, tap
Collapse All Airways.
Airway Collapsed
Indication
Exit Waypoint
3.5
OBS
The Omni Bearing Selector (OBS) allows you to select
between manual or automatic sequencing of waypoints.
When active, this function allows you to set the desired course To/From a waypoint
using the provided controls or with an external OBS selector on HSI or CDI.
The following example shows OBS
course selection for To waypoint
UBG.
Direct To FPL Tab
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Route Indication
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Navigation
1. Tap OBS.
2. Specify a heading course.
CDI indicates the OBS heading.
The mode displays on the
annunciator bar.
The unit retains the active To waypoint as a navigation reference even after passing
the waypoint (i.e., prevents sequencing to the next waypoint).
Tapping the key again resumes automatic sequencing of waypoints (normal mode).
SUSPEND/UNSUSPEND
SUSP
UNSUSP
This key displays for leg types
that do not support OBS.
190-02207-02 Rev. B
This key displays for legs that
auto suspend (e.g., leg holds,
missed approaches).
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Navigation
3.6
Dead Reckoning
WARNING
DO NOT USE PROJECTED POSITION DATA AS THE ONLY MEANS OF
NAVIGATION.
Points About Dead Reckoning
• Provides limited navigation using the last known position and speed following
the loss of GPS navigation while on an active flight plan
• Becomes active after a loss of GPS position while navigating using an active
flight plan and the flight phase is either En Route or Oceanic
• Allowed only during en route and oceanic phases of flight
When dead reckoning mode is active:
• Map reports “No GPS Position”; overlays are not available
• DR mode annunciation replaces ENR or OCN
• Terrain functionality is not available
• Traffic displays on its dedicated page only
• CDI is not available
Dead reckoning mode ends once GPS position is restored.
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Navigation
3.7
Parallel Track
Create a parallel course offset relative to the current flight
plan. Setup controls provide offset distance and direction
setting (left of track or right of track).
FEATURE REQUIREMENTS
• Active flight plan
FEATURE LIMITATIONS
• Function not available when Direct-to is active.
• Graphical editing of the active leg cancels the parallel track function
• Offset range: 1 nm to 99 nm
• Large offset values combined with certain leg types (e.g., approach) or leg
geometries (i.e., changes in track >120º) do not support parallel track
TRACK
COLOR
Offset
Magenta
Original
Gray
Once activated, a new track line appears to the
left or right of the original course line at the
specified distance. The aircraft navigates to the
offset track with external CDI/HSI guidance now
driven from the parallel track.
Corresponding fix symbols on the GPS NAV key and flight plan indicate
when the active leg is on a parallel track.
A graphical depiction overlays on
the map.
Map
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Navigation
To
WPT
Offset
To
WPT
ck
na
igi
Or
ra
lT
Offset Distance
lel
ral
From
WPT
ck
Tra
Pa
Offset
From
WPT
ACTIVATE A PARALLEL TRACK
1. Tap Menu > Parallel Track.
2. Tap Offset and specify a distance between
1 nm and 99 nm.
3. Tap Direction and select left of track or
right of track.
4. Tap Activate.
To deactivate parallel track, tap Menu > Deactivate PTK.
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3.8
Edit Data Fields
To select a flight plan data column,
tap Edit Data Fields. Columns are
arranged in numerical order (1 - 3).
To restore columns to default display
settings, tap Restore Defaults.
CUM
Cumulative Distance
Selections are identical for each column.
By default, flight plan information fields
display:
DIS
Distance
Column 1: DTK
DTK
Desired Track
Column 2: DIS
ESA
En Route Safe Altitude
Column 3: CUM
ETA
Est. Time of Arrival
ETE
Est. Time En Route
DATA FIELD SELECTIONS
3.9
Flight Plan Catalog
Create, activate, edit, copy, and delete flight plans within the
catalog.
FEATURE LIMITATIONS
• Stores up to 99 flight plans with a maximum of 100 waypoints each
Departure
WPT
Destination
WPT
Comment
Each catalog entry includes a
route identifier, the route
distance, and en route safe
altitude.
Distance
The identifiers of the departure
and destination waypoints
comprise the route identifier.
En Route Safe Altitude
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Navigation
3.9.1
Catalog Route Options
Selecting a flight plan opens a menu. Changes
to the active flight plan take effect immediately.
• Activate the selected flight plan
(replacing the active flight plan)
• Reverse and activate the selected flight plan
• Preview a selected flight plan
• Make changes to a flight plan
• Copy the flight plan and modify it to create
a similar one
• Remove individual or multiple flight plans
ACTIVATE
Activating a stored flight plan overwrites the active flight plan.
INVERT & ACTIVATE
Reverse and activate the selected flight plan for guidance back to your original
departure point. The inverted flight plan is a copy. Changes do not affect the original
flight plan, which remains stored in the catalog.
PREVIEW
View the flight plan route as it will
appear on Map and on the Active
FPL page.
Options include Store, Edit, and
ACTV (Activate).
EDIT
Modify the selected flight plan on the Edit Catalog Flight Plan page.
COPY
Create a copy of the selected flight plan. A copy may be used as a starting point for
creating a similar flight plan. Select the copy and tap Edit to make modifications.
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DELETE A FLIGHT PLAN
Deleting the active flight plan does not delete the stored flight plan in the catalog.
From the FPL menu:
1. Tap Menu > Delete.
2. Confirm the request.
From the catalog:
1. Select a flight plan.
2. Tap Delete.
3. Confirm the request to delete all waypoints.
DELETE ALL CATALOGED FLIGHT PLANS
To remove all flight plans from the catalog:
1. Open the catalog.
2. Tap Menu > Delete All.
3. Confirm the request to clear the catalog.
4. Tap Delete Pending.
5. Confirm the request to remove all flight plans pending preview.
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Navigation
3.10 Create a Flight Plan
NOTE
The unit cannot verify the accuracy of cataloged flight plans with modified
procedures.
There are three methods for creating a new flight plan.
CREATE FROM THE ACTIVE FLIGHT PLAN PAGE
1. Tap Flight Plan.
2. Delete the existing flight plan if necessary (Menu > Delete).
3. Tap Add Waypoint.
4. Select an identifier using the provided search options.
5. Repeat steps 3 - 4 for each waypoint in the route.
CREATE FROM MAP
Build a flight plan by selecting waypoints directly on the map using the Graphical Edit
feature. For more about this method, read section 3.2.2.
CREATE FROM THE FLIGHT PLAN CATALOG
1. Tap Flight Plan > Menu > Catalog.
2. Scroll to the end of the flight plan list.
3. Tap Create New Catalog Route > Add Waypoint.
4. Add waypoints using the provided search options.
5. Tap Menu > Preview > Store or ACTV (Activate).
As a general practice, never save flight plans with modified procedures in the
catalog.
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Navigation
3.10.1
Flight Plan Waypoint Options
Selecting a waypoint identifier opens a menu.
Changes to the active flight plan take effect
immediately.
• Insert a new waypoint into a flight plan
• Add an airway or procedure
• Change the active leg
• Remove a selected waypoint
• Add a holding pattern to an existing waypoint
• View information about a waypoint
Insert Before
Insert a new waypoint before the selected waypoint.
Insert After
Insert a new waypoint after the selected waypoint.
Load PROC
Open the Procedures app to specify a departure, arrival,
or approach for loading. Available controls are dependent
upon the relative position of the aircraft to the active flight
plan. Options may include: • Activate Approach
• Vectors to Final • Activate Missed Approach
Load Airway
Assign an airway and exit waypoint to the selected entry
waypoint (e.g., intersection, VOR).
Activate Leg
Designate any TO waypoint as the active flight plan leg.
Requires an active catalog flight plan.
Hold at WPT
Create a user-defined hold at the selected waypoint.
Specify hold parameters and preview holding patterns
from a dedicated menu page.
WPT Info
Open the dedicated information page for the selected
waypoint.
Remove
Remove the selected waypoint or hold from the active
flight plan.
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Navigation
3.11 Flight Plan Map Overlay
LEG STATUS
COLOR
Active
Magenta
Next & Future
White
Past or Inactive
Gray
Active, next, and previous flight plan legs
overlay on the Map page and are display
only.
Previous Leg(s)
Active Leg
Next Leg(s)
Leg Status Indications
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Navigation
3.12 GPS NAV Status
This indicator key displays from-to-next route information when an active flight plan
exists. It resides in the lower right corner of the display.
Indications change based on active leg status.
No Flight Plan Exists
Route Indicator Only
Tap for direct access to the
active flight plan.
Once the page is open, the
indicator is display only.
Page icon means an active
flight plan does not exist.
Underscores denote the
absence of an active leg.
Active Route Display
CDI Scale Active
Label changes to show active
route identifiers (from-to-next)
and leg types.
Only from-to waypoints display
when the CDI scale is active.
This function is controlled via
the System Setup screen.
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Navigation
Direct To
Tapping this key opens the Direct To function. Search tabs
provide three different methods of waypoint selection.
FEATURE LIMITATIONS
• Not all flight plan entries are selectable using Direct To
(e.g., holds, course reversals)
3.13 Direct To Basics
Set a course to any waypoint using
Direct To.
Direct To is useful for
quickly navigating to:
• New waypoints
• An existing waypoint in the
active flight plan
• Nearby airports
• Map waypoints
• An off-route course
• User-defined holds
3.13.1
Selecting an identifier automatically
displays information about the
waypoint.
When navigating to a single
waypoint (e.g., a nearby airport),
the Direct To function provides a
quicker alternative to using the
active flight plan.
Direct To Search Tabs
Search tabs include: Waypoint, FPL, and NRST APT
Direct To Window
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Navigation
WAYPOINT
Similar to an information page, but with course and hold options. This tab is active
by default.
DATA FIELDS
CONTROLS
• Distance and bearing from current
aircraft position
• Waypoint Identifier key with
access to multiple search tabs
• Applicable city, state, country
and/or region (e.g., “NW USA”)
• Course To key for specifying he
course angle for the navigation
path
• Identifier and type icon
• Hold key for creating, loading,
and activating user-defined holds
FPL & NRST APT
FPL and NRST APT tabs provide a list of selectable identifiers. These tabs have a
uniform layout.
FPL: Lists all waypoints contained in the active flight plan.
NRST APT: Lists up to 25 waypoints within a 200 nm radius. The closest airport
appears at the top of the list.
3.13.2
Direct To Activation
Activating a direct-to course establishes a point-to-point
line from the aircraft’s present position to the selected
destination. The unit provides course guidance until you
remove the direct-to waypoint, or replace it with a new
direct-to or flight plan.
Upon activation, Map automatically opens to show a graphical representation of the
active direct-to leg.
GPS Nav key changes to indicate
active leg status.
For convenience, you may open the Direct To function by
pushing the control knob. Once a waypoint is selected,
pushing the knob again activates the direct-to course.
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Navigation
3.13.3
Navigating Direct To
While most direct-to operations follow the same basic steps, the method for
selecting a waypoint may vary.
DIRECT TO A NEW WAYPOINT
1. Tap Direct To.
2. Select a waypoint identifier.
3. Tap Course and specify the course heading (if a specific course is necessary).
4. Activate the selection.
DIRECT TO A FLIGHT PLAN WAYPOINT
Flight Plan Waypoints
If a flight plan exists, waypoint
sequencing resumes once you
reach the direct-to waypoint. If
the waypoint is not in the flight
plan, the flight plan is no longer
active but remains available.
Direct To options are not available for all
flight plan entries. Some entries include
holds and course reversals which are not
selectable using Direct To.
1. Tap Direct To.
2. Select FPL tab.
3. Select a flight plan leg.
4. Activate the selection.
DIRECT TO THE NEAREST AIRPORT
1. Tap Direct To.
2. Select NRST APT tab.
3. Select an airport.
4. Activate the selection.
DIRECT TO A MAP WAYPOINT
Apply a direct-to course to any location
on the map.
MAPWPT
For map locations without an
existing name, Direct To assigns
the “MAPWPT” identifier.
Bearing, distance, and map
coordinates display on the
Waypoint tab.
1. Tap a location on Map.
2. Tap Direct To.
3. Activate the selection.
You can modify direct-to routes on Map using the Graphical Edit function the
same as you would a flight plan.
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DIRECT TO AN OFF-ROUTE COURSE
You may activate an off-route course using any of the described direct-to methods.
Activating an off-route direct-to course automatically deactivates the current leg of
the active flight plan.
Direct To &
Procedure Fixes
Approach guidance is not
available for procedure fixes. An
example would be activating a
direct-to course to a waypoint
between the final approach fix
and missed approach point. Upon
arriving at the waypoint, approach
guidance does not become active.
3.13.4
Removing a Direct-to Course
To cancel the current direct-to course, tap Remove.
Removing a direct-to course:
• Reactivates the original active flight plan
• Assigns the leg nearest to the aircraft’s position as the active leg
• Resumes waypoint sequencing
If no active flight plan exists, the aircraft continues on its current heading without
any navigation guidance.
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Navigation
3.13.5
User Holds
You may define a holding pattern for any direct to waypoint. User holds suspend
automatic waypoint sequencing until they expire or are removed.
Tapping Hold displays available hold options.
Load Hold
Accept the specified hold parameters and return to the
Direct To window.
Hold Activate
Activate the loaded holding pattern.
Course
Specify the course angle.
Direction
Select between Inbound or Outbound.
Turn
Select between Left Turn or Right Turn.
Leg Type
Select Time or Distance.
Leg Time
Specify the leg time in minutes and seconds (MM:SS).
Leg Distance
Specify the leg distance.
EFC
Specify a time for the Expect Further Clearance reminder.
Preview
View the defined holding pattern as it will appear on Map
and on the Active FPL page.
CREATE & ACTIVATE A HOLD
Create a hold for a direct-to waypoint. From the
Waypoint tab:
1. Tap Hold.
2. Specify hold parameters.
3. Tap Load Hold > Hold Activate.
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Navigation
Waypoints
There are two types of waypoints: database and user
Database waypoints (i.e., waypoints contained
in the navigation database) are organized into
the following groups.
• Airport (APT)
• Intersection (INT)
• Very High Frequency Omni-directional
Range (VOR)
• Visual Reporting Point (VRP)
• Non-Directional Beacon (NDB)
The Airport page is a great place to start when performing an approach brief,
checking weather, or considering a diversion.
You also have the ability to define any point in space and store it.
Unlike database waypoints, these “user” waypoints are editable.
3.14 Waypoint Information
Dedicated information pages provide waypoint search functions
and details not available on the Map page.
FEATURE REQUIREMENTS
• FIS-B (viewing NOTAMs)
• Navigation database containing VRP waypoint data
FEATURE LIMITATIONS
• 2-D maps provide zoom functionality only
• FIS-B transmits distant and FDC NOTAMs within 100 nm of radio station
position
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Navigation
Intersection, VOR, VRP, and NDB information pages have a uniform layout.
1
7
2
6
5
3
4
VOR Information Page
1
Waypoint Identifier key
5
Nearest NAVAID information
2
Location Information
6
Waypoint coordinates
3
Preview key
7
Waypoint distance and bearing
4
Waypoint specific information
(e.g., class, station declination, frequency)
COMMON PAGE FEATURES
All waypoint information pages share the following features.
DATA FIELDS
CONTROLS
• Distance and bearing from current
aircraft position
• Waypoint Identifier key with
access to multiple search tabs
• Latitude and longitude
• Preview key for displaying a 2-D
map of the surrounding area
(includes SafeTaxi airport
depictions)
• Applicable city, state, country
and/or region (e.g., “NW USA”)
• Identifier and type icon
As you approach an airport, use the Preview function to orient yourself for such
things as pattern entry or runway alignment.
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WAYPOINT SPECIFIC PAGE FEATURES
Features listed here are unique to the corresponding waypoint.
Airport
Selectable tabs:
Info: Airport location, elevation, time zone, and fuel
availability.
Procedures: Available approach procedures.
Runways: Identifiers, size, surface type, and traffic pattern
direction.
Tapping Runway opens a list of
available runways.
Frequencies: Available communication and localizer
frequencies. The “c” symbol denotes frequencies that function
as the CTAF.
View additional frequency information by tapping
More Information, if available.
WX Data: Applicable METARs, city forecasts, and TAF weather
information.
NOTAMs: Applicable distant and FDC NOTAMs.
VRPs: Nearest VRPs.
Intersection
Data fields:
• Nearest VOR (identifier, type icon, bearing, and distance)
Very High Frequency Omni-directional Range
Data fields:
• Frequency
• Nearest airport (identifier, type icon, bearing, and distance)
• Station declination
• VOR class
Visual Reporting Point
Data fields:
• Nearest VRP (identifier, type icon, bearing, and distance)
Non-Directional Beacon
Data fields:
• Frequency
• Nearest airport (identifier, type icon, bearing, and distance)
• Marker description
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Navigation
User Waypoint
Selectable functions:
Edit: Opens the Create User Waypoint page for editing
purposes.
View List: Displays a list of all user waypoint identifiers.
Delete: Removes the selected user waypoint from the list.
Delete All: Removes all user waypoints from the list.
All deletions require user confirmation.
User waypoints in the active flight plan cannot be
edited or deleted.
Data fields:
• Reference position or nearest waypoint (identifier, type icon,
radial, and distance), whichever is applicable
• Number of waypoints used out of 1,000
The User WPT page is the only page that allows you to view an entire list of all
user waypoints created and saved in the database.
3.15 Waypoint Selection
The Waypoint Identifier key provides access to
different waypoint search options. Enter a specific
identifier or select one from the available search tabs.
3.15.1
Waypoint Autofill
Autofilled
Character
Alphanumeric characters autofill based on the
first alphabetical match in the navigation
database.
Autofill characters are cyan and display from the
cursor position to the right of the field.
Identifier
Name
Waypoint
Icon
Matching waypoint entries typically change with the addition
of each typed character. An information key reflects each
matching entry.
Info Key
“No matches found” and “Duplicate found” annunciate when applicable.
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3.15.2
Search Tabs
The Find key provides access to multiple search tabs.
Each tab displays a list of selectable identifiers based on specific criteria.
Waypoint Search Tabs
Waypoint
Identifier
Type Icon
Each entry includes general
information about the
associated waypoint.
Bearing & Distance
RECENT
Lists up to 20 of the most recently viewed waypoints.
NEAREST
Lists up to 25 waypoints within a 200 nm radius.
Tap Filter and select from the available filter options. Only waypoints
belonging to the selected class appear in the list.
To list all classes,
select All.
FLIGHT PLAN
Lists all waypoints contained in the active flight plan.
USER
Lists up to 1,000 user-defined waypoints.
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SEARCH BY NAME
Lists all airports, NDBs, and
VORs associated with the
specified facility name.
Tap Search Facility Name to
begin search.
SEARCH BY CITY
Lists all airports, NDBs, and
VORs found in proximity of
the city.
Tap Search City Name to
begin search.
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3.16 Create User Waypoints
Create and store up to 1,000 user defined waypoints.
FEATURE LIMITATIONS
• Overwriting an existing waypoint identifier of the same name is not allowed.
• Names may be up to six characters in length
• Comment may be up to 25 characters
• Maximum waypoint limit: 1,000
Access this page from one of two places:
• Waypoint Info page
• Map page
MAP POINTER KEY
Tapping any location on the map that is not a existing
waypoint displays the Create Waypoint access key.
USER WAYPOINT IDENTIFIER
Assign a unique identifier or keep the unit generated
identifier. By default, the identifier format is “USR”
followed by a sequential three digit number.
User waypoints are helpful when ATC requests that you fly one radial to intercept
another. While the point is often defined by an intersection in the navigation
database, this is not always the case. The Create User Waypoint function allows
you to define the new intersection and insert it into the flight plan in advance, as
opposed to using the NAV radio to tune each VOR and specify the radials to fly
inbound and outbound.
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3.16.1
Define Waypoint Criteria
Active user waypoints already existing
in a flight plan are not editable.
When creating a user waypoint, you
have the option to:
• Create a user waypoint
• Assign a unique identifier
• Set the waypoint as temporary
• Enter a comment
• Set the waypoint position
• Edit the waypoint graphically
[1]
Waypoint position options are mutually
exclusive. Enabling one disables the other.
User Identifier
Assign a unique identifier.
Comment
Type a comment regarding the new waypoint.
Position
Set the waypoint position.
Graphical Edit
Open a preview map for graphical editing purposes. User
waypoint icon remains stationary as you move the
surrounding map to the new location.
Temporary
Assign the waypoint a temporary status. Identifier remains
available until the next unit power cycle.
Create
Add the new identifier to the used waypoints list. The
associated information page opens automatically for
viewing and editing purposes.
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Navigation
COMMENT FORMAT
Default comments display in a specific format for each reference type.
LAT/LON
Radial/Distance
<LAT> <LON>
<Waypoint><Radial> / <Distance>
Radial/Radial
<Waypoint 1><Radial 1> / <Waypoint 2><Radial 2>
POSITION OPTIONS
Set the Waypoint Position using one of the following options.
Radial/Radial:
Specify a waypoint and radial for each of the two reference points.
Radial/Distance:
Specify the reference waypoint, radial, and distance.
LAT/LON:
Specify the point’s latitude and longitude.
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3.16.2
Edit an Existing User Waypoint
FEATURE LIMITATIONS
User waypoints that are part of a flight plan are not editable.
OPEN EDIT WAYPOINT PAGE
You can access the edit function multiple ways.
From the dedicated information page:
Home > Waypoint Info > User WPT > Specify an identifier, or tap View List and
select an identifier from the used waypoints list > Edit
From the Nearest page:
Home > Nearest > User WPT > Select an identifier from the list (e.g., USR001) >
Edit
From the Active FPL page:
Home > Flight Plan > Select the identifier from the flight plan > WPT Info > Edit
MODIFY POSITION VALUES
From the Edit WPT page, you can modify a user waypoint’s position one of two ways:
1. Tap Position > Latitude/Longitude > Specify the waypoint’s coordinates >
Save.
OR
1. Tap Graphical Edit.
2. Hold and drag the basemap until the user waypoint icon appears over the
desired location.
3. Tap Enter > Save.
3.16.3
Import User Waypoints
NOTE
The import function overwrites any existing user waypoint of the same
name.
The Import Waypoints key appears when the unit detects a user
waypoint on the datacard.
1. Insert datacard containing user waypoints.
2. From the Home page, tap Waypoint Info > Import Waypoints.
3. Acknowledge the pop-up message.
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3.17 Nearest
View a list of the nearest waypoints, frequencies, or facilities
within 200 nm of the aircraft’s position.
From the Home page:
1. Tap Nearest > Select a waypoint or frequency icon.
2. Scroll through the list of entries.
Information varies according to the selected waypoint or frequency type. Nearest
waypoints provide an identifier key for accessing the associated information page.
Nearest Airport
• Identifier • symbol • distance • bearing • approach type
• length of longest runway
Nearest Intersection
• Identifier • symbol • distance • bearing
Nearest Very High Frequency Omni-directional
Range
• Identifier • symbol • distance • bearing • frequency
Nearest Visual Reporting Point
• Identifier • symbol • distance • bearing
Nearest Non-Directional Beacon
• Identifier • symbol • distance • bearing • frequency
Nearest User Waypoint
• Identifier • symbol • distance • bearing
Nearest Airspace
• Identifier • symbol • proximity
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Nearest Air Route Traffic Control Center
• Facility name • distance • bearing • frequency
Nearest Flight Service Station
• Facility name • distance • bearing • frequency
(“RX” denotes receive-only frequencies)
Nearest Weather Frequency
• Facility name • distance • bearing
• frequency of nearest ATIS, ASOS, and AWOS
ENTRY LIMITS
NEAREST LIST
ENTRY
LIMIT
ARTCC, FSS
05
Airspace
20
Airport, Intersection, VOR, VRP,
NDB, User, Weather FREQ
25
The number of entries
displayed varies according
to item type.
Entries are ordered from
closest to farthest.
UPDATE INTERVALS
With the exception of nearest airspace, all lists update every 30 seconds. The nearest
airspace list updates once per second.
MULTIPLE FREQUENCIES
This key displays when more than one frequency is
available at the indicated range.
Applicable to functions displaying information only
(ARTCC, FSS, and WX FREQ).
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Procedures
Lateral and vertical guidance is available for visual and GPS/RNAV
approaches. The published instrument approach procedures allow
precision and non-precision approaches to airports and are directly
accessible from the Procedures (PROC) icon.
FEATURE REQUIREMENTS
• Baro-corrected altitude source (automatic sequencing of altitude leg types)
In the absence of baro-corrected altitude data, altitude leg types require manual
sequencing.
FEATURE LIMITATIONS
• The flight plan allows only one procedure to be loaded at a time. Adding a
new procedure overwrites any existing procedure
LOAD A PROCEDURE
Select a procedure type, then define the
criteria for that procedure on the
corresponding setup page.
By default, these keys display underscores.
Upon completion, the specified airport and
procedure appear on the associated key.
When loading a procedure, always remember to check the runway, transition,
and all waypoints.
COMMON PAGE CONTROLS
All procedure pages provide the following setup controls.
Airport: Select an airport for the procedure.
Transition: Select a transition.
Runway: Select a runway for the selected airport.
Preview: View a 2-D map of the surrounding area (includes SafeTaxi airport
depictions).
For page specific controls, refer to the appropriate procedure description.
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3.18 Flight Procedure Basics
NOTE
Advisory climb altitudes for SIDs may not match charted altitudes. Do not
rely solely on advisory altitudes.
• Always check the runway, transition, and waypoints for all procedures.
• Heading legs indicate in white as “HDG XXXº” on flight plans.
• The unit provides lateral and, when appropriate, vertical guidance for visual
and GPS/RNAV approaches.
• Use Map as an aid to situational awareness during ILS, VOR, NDB, and
non-precision localizer-based approaches. A magenta line depicts the active
leg (or the portion of the approach currently in use).
• Always use the appropriate radio navigational aid for primary approach
course guidance during non-GPS approaches.
• Check the annunciator bar for the current phase of flight.
• Many non-precision approaches have GPS overlays, improving accuracy so
that approaches do not require overflying a VOR or NDB.
• The unit guides you through complex overlay approaches, automatically
sequencing each leg up to the missed approach point.
• Fly approaches as published with the full transition using any published
feeder route or initial approach fix, or with a vectors-to-final transition.
• While not required under TSO-C146e, an optional baro-corrected altitude
source is recommended for automatic sequencing of altitude leg types.
When adding procedures to a flight plan:
• Arrange procedures around the existing flight plan as follows:
Departure, En route, Arrival, Approach
• Insert departure waypoints before en route waypoints
• Insert arrival waypoints between en route and approach waypoints
• Always verify that the transition waypoints between each phase are correct
Map complements your printed approach plates by improving situational
awareness during the approach. It does not replace printed approach plates.
Always fly an approach as it appears on the approach plate.
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Roll Steering Autopilots
Roll steering terminates when
approach mode is selected on
the autopilot. It becomes
available once you initiate the
missed approach.
TO/FROM LEGS ON CDI
TO LEGS
FROM LEGS
On these legs, the FROM/TO flag on
the CDI indicates “TO” and the
Distance field on the flight plan
decreases as you navigate the leg.
Most legs are this type.
On these legs, the FROM/TO flag on
the CDI indicates “FROM” and the
Distance field on the flight plan
increases as you navigate the leg.
From legs are typically found on
procedure turns and on some missed
approach procedures.
Composite CDI. When interfaced to a composite
type CDI, the composite CDI flag shows only “TO”
indications. Always refer to the FROM/TO field on
the annunciator bar when using composite CDI.
FROM/TO
Field
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3.18.1
GPS Flight Phase Annunciations
Flight Phase
(Caution)
Check the annunciator bar for current phase
of flight.
Under normal conditions, these annunciations
are green. They turn yellow when cautionary
conditions exist.
Phase of flight annunciations are a direct indication of the current CDI behavior for
the selected navigation source.
Not all annunciations are available for every navigator.
ANNUNCIATION
0.30 NM
1.00 NM
DPRT
FLIGHT PHASE
• 0.3 nm CDI scale
• Based on pilot selection
• 1.0 nm CDI scale
• Based on pilot selection
Departure
• Terminal level with departure procedure as the active
navigation
• System using non-precision approach integrity
• CDI full-scale deflection: 0.30 nm
DR
Dead reckoning
• CDI not available
ENR
En route
• CDI full-scale deflection: 2.0 nm or current CDI scale
selection, whichever is smaller
LNAV
Lateral Navigation Approach
• Fly to published LNAV minimums
LNAV+V
Lateral Navigation Approach with Advisory Vertical
Guidance
• Fly to published LNAV minimums
L/VNAV
Lateral and Vertical Navigation Approach
• Fly to published LNAV/VNAV minimums
LOW ALT
Low Altitude
• Aircraft’s estimated height is lower than the final
approach waypoint height by approximately 50 meters
• For LNAV+V, LNAV/VNAV, or LPV approaches
• Not active when Terrain is operational
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ANNUNCIATION
FLIGHT PHASE
LP
Localizer Performance Approach
• Fly to published LP minimums
LP +V
Localizer Performance Approach with Advisory
Vertical Guidance
• Fly to published LP minimums
LPV
Localizer Performance with Vertical Guidance
Approach
• Fly to LPV minimums
MAPR
Missed Approach
• System using missed approach integrity
• CDI full-scale deflection: ±0.30 nm
OCN
Oceanic
• CDI full-scale deflection: 2.0 nm
TERM
Terminal
• CDI full-scale deflection: 2.0 nm or current CDI scale
selection, whichever is smaller
VISUAL
Visual Approach
• Vertical guidance based on advisory terrain avoidance
calculations
• CDI scaling is identical to LPV approaches
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3.19 Departures
Loading a Departure into Flight Plan
• Always load the departure at the departure airport in the flight plan
• Flight plans allow only one departure procedure at a time
• Loading a departure when one is already present will replace the existing entry
• Selecting a departure, transition waypoint, and runway defines the route
FEATURE LIMITATIONS
• Vector-only departures are not available in the Procedures database
PAGE SPECIFIC CONTROLS
Load Departure: Loads departure
procedure into the active flight plan.
Activate Departure: Activates the
loaded departure procedure.
Remove Departure: Removes the
loaded departure procedure.
SELECT A DEPARTURE
From the Home page:
1. Tap PROC > Departure.
2. Confirm the selected airport. If necessary, tap Airport and choose an airport
using the provided search options.
3. Tap Departure > Select a departure from the list.
4. Tap Transition > Select a transition.
5. Tap Runway > Select a runway.
6. Tap Preview > Review the departure diagram and sequence list.
7. Tap Load Departure. The Active FPL page opens.
8. Scroll the flight plan to view all departure waypoints.
To change or remove the departure:
• Tap the existing flight plan
departure
• Select a different one.
OR
• Tap Remove Departure.
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3.19.1
Flight Plan Departure Options
Selecting a departure on the flight plan opens
a menu. Changes to the active flight plan take
effect immediately.
• Select a new departure
• Remove the selected departure from the
flight plan
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3.20 Arrivals
Loading an Arrival into Flight Plan
• Load a Standard Terminal Arrival (STAR) at any airport with a published
arrival procedure
• Flight plans allow only one arrival procedure at a time
• Loading an arrival when one is already present will replace the existing entry
• Selecting an arrival, transition waypoint, and runway defines the route
PAGE SPECIFIC CONTROLS
Load Arrival: Loads arrival
procedure into the active flight plan.
Activate Arrival: Activates the
loaded arrival procedure.
Remove Arrival: Removes the
loaded arrival procedure.
SELECT AN ARRIVAL
From the Home page:
1. Tap PROC > Arrival.
2. Confirm the selected airport. If necessary, tap Airport and choose an airport
using the provided search options.
3. Tap Arrival > Select an arrival from the list.
4. Tap Transition > Select a transition.
5. Tap Runway > Select a runway.
6. Tap Preview > Review the arrival diagram and sequence list.
7. Tap Load Arrival. The Active FPL page opens.
8. Scroll the flight plan to view all arrival waypoints.
To change or remove the arrival:
• Tap the existing flight plan
arrival.
• Select a different one.
OR
• Tap Remove Arrival.
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3.20.1
Flight Plan Arrival Options
Selecting an arrival on the flight plan opens a
menu. Changes to the active flight plan take
effect immediately.
• Select a new arrival
• Remove the selected arrival from the flight
plan
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3.21 Approaches
Loading an Approach into Flight Plan
• Always check the runway, transition, and all waypoints
• Flight plans allow only one approach procedure at a time
• You may load an alternate approach during a missed approach procedure
(flight plan retains all missed approaches)
• Loading an approach when one is already present will replace the existing entry
• Selecting an approach, transition waypoint, and runway defines the route
PAGE SPECIFIC CONTROLS
Load Approach: Loads approach
procedure into the active flight plan.
Activate Approach: Activates the
loaded approach procedure.
Remove Approach: Removes the
loaded approach procedure.
Channel/ID: Loads an SBAS
approach based on the specified
channel.
SELECT AN APPROACH
From the Home page:
1. Tap PROC > Approach.
2. Confirm the selected airport. If necessary, tap Airport and choose an airport
using the provided search options.
3. Tap Approach > Select an approach from the list.
4. Tap Transition > Select a transition.
5. Tap Runway > Select a runway.
6. Tap Preview > Review the approach diagram and sequence list.
7. Tap Load Approach. The Active FPL page opens.
8. Scroll the flight plan to view all approach waypoints.
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To change or remove the approach:
• Tap the existing flight plan
approach.
• Select a different one.
OR
• Tap Remove Approach.
SBAS APPROACHES
To load an SBAS approach:
Channel ID Key
• Select the channel ID for an
SBAS approach to the current
destination
• Provides an alternate means
of loading an approach.
1. Tap Channel/ID.
2. Specify an approach channel.
If present, both channel and ID load
automatically.
• IDs are available from an
approved approach chart
• In the case of duplicate
numbers, select an approach
from the provided list
SUSPENDED APPROACH PROCEDURE ANNUNCIATION
“SUSP” indicates that automatic sequencing of approach waypoints is suspended on
the active leg. This annunciation appears in the procedure field of the annunciator
bar.
Suspended approaches typically occur during:
• Holding patterns
• Crossing the missed approach point
• Climb to altitude legs
• Hold to altitude legs
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PROCEDURE TURNS
Roll Steering &
Procedure Turns
The steering provided for a
procedure turn does not guarantee
that the aircraft will
stay within the charted procedure
turn boundaries. Always be sure
to fly within the confines of the
charted procedure.
3.21.1
A procedure turn is stored as another
approach leg. It does not require any
special operations other than flying
the procedure itself.
Roll steering is available for aircraft
with a compatible autopilot.
Flight Plan Approach Options
Selecting an approach on the flight
plan opens a menu. Changes to the
active flight plan take effect
immediately.
• Activate the selected approach
• Activate vectors to final for the
selected approach
• Activate a missed approach
• Select a new approach
• Remove the selected approach
from the flight plan
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3.21.2
Missed Approach
The method for activating a missed approach depends on your position in relation to
the missed approach point.
BEFORE MISSED APPROACH POINT
Select Activate Missed Approach. This function is available in two locations.
Active FPL:
Home > Flight Plan > Select the approach > Activate Missed Approach
OR
Procedures:
Home > Procedures > Activate Missed Approach
Once selected, guidance continues along an extension of the final approach course
(i.e., final approach fix to missed approach point).
The unit automatically sequences to the first leg of the missed approach. This allows
you to execute the missed approach prior to reaching the missed approach point.
AFTER MISSED APPROACH POINT
Upon reaching the missed approach point, a pop-up presents two options.
To continue with sequencing
suspended, tap Remain Suspended.
To receive guidance to the missed
approach hold point, tap
Activate GPS Missed Approach.
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3.21.3
Approach Hold
Selecting an approach hold on the flight plan opens
a menu. Changes to the active flight plan take effect
immediately.
• Activate the selected hold
• Insert a waypoint after the hold
• Edit hold details
• Exit the holding pattern before the timer expires
• Remove the selected hold from the flight plan
ACTIVATE HOLD
1. Select the hold.
2. Tap Activate Hold.
3. Confirm the request.
REMOVE HOLDING PATTERN
1. Select the hold.
2. Tap Remove.
3. Confirm the request.
EXIT HOLDING PATTERN
1. Tap SUSP.
2. Select the hold.
3. Tap Exit Hold.
4. Confirm the request.
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NON-REQUIRED HOLDING PATTERNS
Upon activating an RNP GPS
approach, decide whether to skip
non-required holding patterns during
the initial transitions of the approach.
A pop-up presents two options.
Selecting Yes adds the hold to the
flight plan.
Preview shows the hold in white.
Selecting No means the hold is not
included in the flight plan.
Preview shows the hold in gray.
Timer/Distance field displays on the active flight plan (refer here when flying the
outbound portion of the holding pattern). Holding pattern appears on Map with the
active flight plan leg indication.
CROSSING MISSED APPROACH POINT
When crossing the missed approach point:
• “SUSP” annunciation indicates that approach waypoint sequencing is
suspended at the missed approach point
• FROM/TO flag on the CDI indicates “From” for non-composite CDIs
• FROM/TO field on the annunciator bar indicates “FR”
• Course guidance continues along the final approach course
If you need to go around the holding pattern again to lose extra altitude or
speed, tap SUSP to manually suspend waypoint sequencing before crossing the
holding waypoint the second time.
If you have already passed the waypoint, re-activate the holding pattern.
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3.21.4
DME Arc
The unit supports approaches
containing DME arcs.
DME Arc Approaches
• Left/right guidance relative to
the arc
• Manual arc leg activation
once aircraft is near the arc
To manually activate DME Arc, the
aircraft must be within the shaded
area.
DME Arc
Intermediate
Approach
Fix
Initial
Approach
Fix
X
1/2 X
Arcing Fix (VOR)
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3.21.5
RF Legs
AC 90-101A - RF Legs
AC 90-101A defines RF leg as
“A constant radius circular path,
around a defined turn center, that
starts and terminates at a fix. An
RF leg may be published as part of
a procedure.”
The unit supports radius-to-fix (RF)
legs associated with RNAV RNP 1.0
non-AR approaches, when approved by
the installation.
Flying a radius-to-fix approach is similar
to flying a DME arc approach (status
indications are identical).
Unlike DME arcs, however, RF legs are
not based on a VOR. They may have
varying radii, making them larger or
smaller than arc legs.
For details regarding RF legs for specific aircraft, consult the AFMS.
3.21.6
Vectors to Final
Activating the approach with vectors to final displays an
extension of the final approach course on Map.
Magenta depicts the active leg of
the flight plan.
CDI needle remains off center until you are established on
the final approach course. As a reminder, “vtf” annunciates
as part of the active leg on the GPS Nav status key.
Activating vectors-to-final while on the From side of the final approach fix
suspends automatic waypoint sequencing. “SUSP” annunciates at the bottom of
the screen. Sequencing resumes once the aircraft is on the To side of the final
approach fix and within full-scale deflection.
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3.21.7
ILS Approach
NOTE
ILS and LOC approaches are not approved for GPS. GPS guidance is for
monitoring purposes only.
Selecting an ILS or LOC approach
results in a pop-up message.
Activate the approach or select a
different one.
Do not attempt to use the unit as the primary navigation source during ILS approach.
3.21.8
RNAV Approaches
Always fly to the published
minimums for:
Fly RNAV approaches according to
the published chart.
• LNAV/VNAV
• LNAV
• LNAV+V
• LPV
• LP
• LP+V
LNAV APPROACH
RNAV non-precision lateral navigation approach.
LNAV+V APPROACH
RNAV non-precision LNAV approach with advisory vertical guidance.
The glidepath is a light dashed line on the vertical profile (Jeppesen charts only) with
an associated glidepath angle (usually in the 3.00 degree range) to assist in
maintaining a constant vertical glidepath, similar to an ILS glideslope.
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LPV APPROACH
Localizer performance with vertical guidance. Similar to flying the standard ILS
approach.
This segment describes a typical LPV approach sequence and the necessary pilot
actions.
Within 31 nm of destination:
• Mode switches from En Route to Terminal
• CDI scale transitions from 2.0 nm to 1.0 nm, full-scale deflection
Approaching initial approach fix:
• Waypoint message annunciates
• Time to Turn advisory annunciates and 10 second timer counts down as the
distance approaches zero
2.0 nm from final approach fix:
• CDI scaling tightens from 1 nm to the approach-defined angular full-scale
deflection
60 seconds before final approach fix:
• System verifies GPS position integrity is within approach limits
If GPS integrity exceeds the horizontal and/or vertical alarm limits:
• Approach downgrades to non-precision
• “LNAV” annunciates on Map to inform of the change if there are LNAV
minimums for the approach
• Advisory message: ”GPS approach downgraded. Use LNAV minima.”
• Glideslope indication disappears
• Pilot continues approach using LNAV non-precision minimums, if applicable
If GPS integrity does not meet the non-precision horizontal alarm limits:
• Advisory message: “Abort Approach. GPS approach is no longer available.”
• Pilot acknowledges message
• Unit reverts to terminal limits of 1 nm to support navigation to the missed
approach
After the aircraft passes final approach fix:
• Approach aborts due to a loss of WAAS integrity
• Pilot captures the glideslope (method is same as for ILS glideslope)
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When crossing the final approach fix:
• Waypoint sequences to the missed approach point
(e.g., RW31, the runway threshold)
• Pilot flies toward missed approach point, keeping the needle on the external
CDI (or HSI) at center, and observing published altitude minimums
• Final course segment becomes the active flight plan leg on Map
Approaching missed approach point:
• Advisory message: “Arriving at Waypoint.”
Crossing missed approach point:
• Sequencing suspends
• Pop-up message: “Missed Approach Waypoint Reached”
• Pilot decides whether to remain suspended or activate the missed approach
• Tapping Remain Suspended allows you to continue with sequencing
suspended
• Tapping Activate GPS Missed Approach allows you to continue with
guidance to the missed approach hold point
Prepare aircraft for missed approach operation:
• Pilot taps UNSUSP (sequences missed approach), then follows the unit
provided guidance to the missed approach hold point and holds
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LP APPROACH
Points About LP Approaches
• Use SBAS accuracy, making them similar to an LNAV approach but more precise
• Combine the lateral accuracy of an LPV approach with the angular scaling of a
localizer approach
• Often contain step-down altitudes
• Always result in a minimum descent altitude and missed approach point
This segment describes a typical LP approach sequence and the necessary pilot
actions.
Within 30 nm of destination:
• Mode switches from En Route to Terminal
• CDI scale transitions from 2.0 nm to 1.0 nm, full-scale deflection
Approaching initial approach fix:
• Turn direction message annunciates
• Time to Turn advisory annunciates and 10 second timer counts down as the
distance approaches zero
Approaching final approach fix:
• Unit begins to automatically rescale in an angular fashion, allowing you to fly
as you would a standard localizer approach
2.0 nm from final approach fix:
• CDI scaling tightens from 2 degrees or 0.3 nm full-scale deflection,
whichever is smaller
60 seconds before final approach fix:
• System verifies GPS position integrity is within the horizontal limits to
complete the LP non-precision approach
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If pilot exceeds the horizontal alarm limits:
• Approach downgrades to non-precision
• “LNAV” annunciates on Map to inform of the change
• Advisory message: “GPS approach downgraded. Use LNAV minima.”
• Pilot continues approach using LNAV non-precision minimums, if applicable
If GPS integrity does not meet the non-precision horizontal alarm limits:
• Advisory message: “Abort Approach. GPS approach is no longer available.”
• Pilot acknowledges message
• Unit reverts to terminal limits of 1 nm to support navigation to the missed
approach
If the approach indicates “LP+V,” then advisory vertical guidance may be
removed without annunciation. This is due to the vertical guidance not being
within tolerances.
This does not constitute a downgrade. You may still fly the approach to LP
minimums.
When crossing the final approach fix:
• Waypoint sequences to the missed approach point
(e.g., RW31, the runway threshold)
• Pilot flies toward missed approach point, keeping the needle on the external
CDI (or HSI) at center, observing published altitude minimums
• Final course segment becomes the active flight plan leg on Map
Approaching missed approach point:
• Advisory message: “Arriving at Waypoint.”
At the missed approach point:
• Pilot initiates missed approach, if necessary
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Crossing missed approach point:
• Sequencing suspends
• Pop-up message: “Missed Approach Waypoint Reached”
• Pilot decides whether to remain suspended or activate the missed approach
• Tapping Remain Suspended allows you to continue with sequencing
suspended
• Tapping Activate GPS Missed Approach allows you to continue with
guidance to the missed approach hold point
Prepare aircraft for missed approach operation:
• Pilot taps UNSUSP (sequences missed approach)
NOTE: For missed approaches with heading legs, fly manually until you reach the
first active course leg.
• Pilot follows the unit provided guidance to the missed approach hold point
and holds
LP+V
Flying an LP approach with
advisory vertical guidance (LP+V)
does not change how the
approach should be flown. The
pilot is still responsible for
descending to the correct altitude
at each step down.
The result is still an MDA and
missed approach point.
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3.21.9
Visual Approach
Points About Visual Approaches
• Provide advisory horizontal and optional vertical guidance for the selected
runway
• Lateral guidance is always provided for visual approaches
• Helps stabilize the runway approach
• Three methods for loading and activation
FEATURE REQUIREMENTS
• Valid terrain database
FEATURE LIMITATIONS
• Not all airports in the database support visual approaches
• Only external CDI/VDI displays provide vertical deviation indications
Published data is used to determine the visual approach GPA and threshold crossing
height (TCH) for the selected runway. If no published data is available, the default is
3 degrees GPA and 50 ft TCH.
You may load and activate a visual approach from the following apps.
• Map
• Procedures
• Waypoint Info
Upon loading the visual approach,
a pop-up informs when vertical
guidance is available.
If available, the pop-up contains
the glidepath angle (GPA) and
threshold crossing (TCH).
If unavailable, it reads: “NO VERTICAL GUIDANCE”
Terrain and obstacle obstructions along the approach path determine the availability
of vertical guidance advisories for visual approaches.
• If no known obstructions are within the approach path, vertical guidance is
provided to a maximum distance of 28 nm from the runway.
• If there are known obstructions further than 3 nm, but within the 28 nm
maximum distance from the runway along the approach, vertical guidance
is limited to the approach path after crossing the known obstructions. After
loading the approach, a shortened magenta line shows on the map.
If obstructions are within 3 nm to the runway, along the approach path, advisory
vertical guidance is not available.
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Navigation
LOAD A VISUAL APPROACH FROM MAP
When the aircraft is within 10 nm of the destination airport, the Visual Approach
selector key becomes active. This key may appear in one of two places:
On the map or at the left of the screen if the supporting airport is selected.
1. Select the airport icon.
2. Tap Visual.
3. Select from the list of available visual approaches.
Once selected, the visual approach immediately loads and activates.
For more about Visual Approach key configuration, refer to section 3.1.4.
LOAD A VISUAL APPROACH FROM PROCEDURES
Two methods:
Home > PROC > Approach
OR
Home > Waypoint Info > Airport > PROC > Select an approach (similar to
published instrument approaches)
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3-81
Navigation
3.21.10 Autopilot Outputs
CAUTION
ENGAGE THE AUTOPILOT HEADING MODE AND SET THE HEADING BUG
APPROPRIATELY TO USE THE AUTOPILOT ON HEADING LEGS USING THE
AUTOPILOT’S NAV, GPSS, OR APR MODE. NOT ALL AUTOPILOTS FOLLOW
GUIDANCE ON THESE LEG TYPES, SOME REVERT TO A ROLL ONLY OR WINGS
LEVEL MODE.
FEATURE REQUIREMENTS
• Availability dependent upon configuration
FEATURE LIMITATIONS
• Applicable to King KAP 140 and KFC 225 autopilots
Outputs for the King KAP 10/KFC 225 autopilot units require manual activation.
If configured, this function prompts you to enable autopilot outputs during the
approach procedure.
Enable APR Output Advisory
Once enabled, the unit provides guidance information consistent with what the
autopilot expects (i.e., angular CDI scaling and glideslope capture for LPV or other
vertically guided GPS approaches).
ENABLE AUTOPILOT OUTPUTS
1. Acknowledge the advisory message.
2. Tap Enable APR Output.
3. Follow the unit provided guidance.
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Planning
4
Planning
VERTICAL CALCULATOR
4.1
4.2
VCALC Page ..........................................................................................4-3
VCALC Setup ........................................................................................4-4
FUEL PLANNING
4.3
Fuel Planning Page ................................................................................4-5
DALT/TAS/WIND CALCULATOR
4.4
DALT/TAS/Wind Page ............................................................................4-8
RAIM PREDICTION
4.5
RAIM Prediction Page ..........................................................................4-11
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4-1
Planning
PLANNING
APPS & FUNCTIONS
This section describes features that make flight planning easier and
more efficient.
Planning apps and setup functions reside in the system Utilities.
[1]
[2]
[3]
[4]
[5]
4-2
Point-to-Point mode only.
Flight Plan mode only.
From key not selectable when Present Position (P.POS) function is active.
Function not selectable when sensor data in use.
Indicates pressure altitude when sensor data in use.
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Planning
Vertical Calculator
Calculate time to TOD and vertical speed required to reach target
altitude at the specified location.
WARNING
DO NOT RELY ON VCALC MESSAGES AS THE ONLY MEANS OF EITHER
AVOIDING TERRAIN/OBSTACLES OR FOLLOWING ATC GUIDANCE.
VCALC PROVIDES ADVISORY INFORMATION ONLY AND MUST BE USED
IN CONCERT WITH ALL OTHER AVAILABLE NAVIGATION DATA
SOURCES.
FEATURE LIMITATIONS
This feature is inhibited when:
• Groundspeed is < 35 knots
• No active flight plan or direct-to destination is available
• One of the following modes is active: SUSP, Vectors-to-Final, OBS
• Navigating to a waypoint after the FAF
4.1
VCALC Page
The Vertical Calculator (VCALC) feature is helpful
when you want to descend to a certain altitude near
an airport.
Create a 3-D profile to guide you from your present position and altitude to a final
(target) altitude at a specified location. Once defined, you may configure message
alerts and additional data on the Map page to stay informed of your progress.
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4-3
Planning
Target ALT
• Specify the final (target) altitude for the course
• Altitude reference used for VCALC calculations
Altitude Type
• Toggles between “MSL” and “Above WPT”
• Above WPT is available for airports only
VS Profile
• Specify the vertical speed value
Offset
• Distance value representing the geographical location at the
target altitude
• Distance is measured from the target waypoint
Before/After
Target
Waypoint
• Indicates whether the offset distance defines a point before
or after reaching the target waypoint
• “After” indication not available for the last destination in
flight plan
• Reference location specified in the flight plan or active
direct-to that will be used for planning a descent
• When using a flight plan, the target waypoint is a reference
that can be specified from the waypoints in the flight plan
• Last waypoint in the flight plan is the default target setting
STATUS
VCALC status messages display here.
VS REQUIRED
Displays the vertical speed required to reach the target altitude at the specified
offset.
4.2
VCALC Setup
Tap Menu to access controls for:
• Restoring default page settings
• Displaying VCALC related advisory
messages
RESTORE DEFAULTS
Resets VCALC page settings to their default values. Excludes Target Waypoint.
DISPLAY MESSAGES
Allows VCALC related advisory messages to display on the Messages page.
4-4
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Planning
Fuel Planning
View fuel conditions along any flight plan (active or programmed)
or between two waypoints (including the active direct-to).
4.3
Fuel Planning Page
The fuel planning feature computes fuel
conditions based on route, ground speed,
fuel on board, and fuel flow.
4.3.1
Fuel Planning Modes
Tapping Mode toggles the active fuel planning mode between
Point to Point and Flight Plan. Point to Point is the default mode
setting.
POINT-TO-POINT MODE
Calculate fuel between two
waypoints in the database, or
between the aircraft’s present
position and a selected waypoint.
FLIGHT PLAN MODE
Calculate fuel for a specific flight plan
leg, or for the cumulative
flight plan.
Use the mode specific controls to define the flight path (leg or route). Required input
values are dependent upon mode selection.
Fuel on board, fuel flow, and ground speed data are required independent of mode
selection.
For Planning Purposes Only
• Fuel on Board and Fuel Flow are pilot specified values. They are not a direct
indication of actual aircraft fuel on board or fuel flow.
• Fuel Required to <destination> is a calculated prediction based on pilot
specified values. It is not a direct indication of actual fuel quantity once the
aircraft reaches its destination.
• All data entries on this page are used exclusively by the Fuel Planning app.
• Fuel computations are for planning purposes only.
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4-5
Planning
MODE
SELECTION
P. Position
Point-toPoint
DESCRIPTION
• Enters the current aircraft coordinates as the
departure location (or From waypoint)
• Aircraft latitude and longitude fields replace
the From waypoint key
• Specify a waypoint from the database as the
departure location (or From waypoint)
From
• Not available when P. Position is active
• Specify a waypoint from the database as the
destination (or To waypoint)
To
• Opens a list of available flight plans
Flight Plan
• Options include the active flight plan or one
from the catalog
• Defaults to the active flight plan if no
selection is made
Flight
Plan
• Options dependent on flight plan selection
Leg
• Defaults to cumulative leg option if no
selection is made
• Specify the amount of fuel on board (gallons)
Fuel on Board
Fuel Flow
Use Sensor
Data
• This amount decreases once per second
based on specified fuel flow value
• Specify the current fuel flow rate
(gallons per hour)
• Utilize current GPS ground speed data
• Behavior based on state of Use Sensor Data
Both
Use Sensor Data key inactive:
• Function selectable
• Specify ground speed
Ground Speed
Use Sensor Data key active:
• Function not selectable
• Displays current GPS ground speed when the
Use Sensor Data key is active
• This value is used to calculate fuel statistics
when you press the Compute key
Adjust fuel on board and fuel flow values as necessary to account for changes in
performance.
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190-02207-02 Rev. B
Planning
4.3.2
Computing Fuel Statistics
Compute and display fuel data based on the selected fuel
planning mode and specified input values.
Statistics for the selected leg or
route display on a dedicated
data page. This information is
for planning purposes only.
Tap Next or Prev to view
statistics for other legs in the
flight plan (if applicable).
Statistics include:
• Fuel required for leg
• Fuel after leg
• Reserve after leg
• Range
• Efficiency
• Endurance
COMPUTE FUEL STATISTICS
1. Select a fuel planning mode.
2. Define a leg or route.
• If “Flight Plan” is set, select the flight plan and leg. Selecting the active
flight plan sets the starting waypoint at the aircraft’s current position.
• If “Point to Point” is set, select From and To waypoints, or use the
aircraft’s current position as the From waypoint.
3. Specify the amount of fuel on board and average fuel flow rate.
4. Specify ground speed or elect to use sensor data.
5. Tap Compute.
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GPS 175/GNX 375 Pilot’s Guide
4-7
Planning
DALT/TAS/Wind Calculator
Calculate density altitude, true airspeed, and winds.
FEATURE REQUIREMENTS
• Fuel/air data computer (pressure altitude)
• Valid sensor data
4.4
DALT/TAS/Wind Page
This feature indicates the theoretical
altitude at which the aircraft performs
based on several input variables.
4.4.1
Editing Input Data
Available selections are dependent on sensor data use. TAT and HDG may also be
available via an external data source.
Not Selectable
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GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Planning
• Specify indicated altitude value [1] [2]
Indicated ALT
• Use +/- keys to indicate above or below sea level
• Mutually exclusive with Pressure ALT
BARO
• Specify barometric pressure value [3]
CAS
• Specify calibrated air speed value [2]
• Specify true air temperature
TAT
• Use +/- keys to indicate above or below 0º
HDG
• Specify heading value
TRK
• Specify track angle value [2]
Use Sensor
Data
• Inputs reference values
(internal or received from air data computer)
• Replaces indicated altitude with pressure altitude
received from fuel/air data computer
• Excludes TAT and HDG
Ground Speed
[1]
[2]
[3]
• Specify ground speed [2]
Toggles to Pressure ALT indication when sensor data in use.
Not selectable when sensor data in use.
This field is absent when sensor data is in use.
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4-9
Planning
4.4.2
Computing DALT/TAS/Wind Statistics
Compute and display density altitude and current wind
conditions. Calculations are based on current input values.
Statistics display on a dedicated
data page. This information is
for planning purposes only.
Dashes indicate when input
values are invalid.
DENSITY ALTITUDE
WIND DATA
• Pressure altitude corrected for
nonstandard temperature
• Wind direction and speed
• Units display in increments of ten
• Tailwind
• Headwind
• True air speed
Density altitude and true airspeed calculations are dependent on indicated altitude, barometric pressure,
and total air temperature.
Wind data calculations are dependent on true airspeed, aircraft heading, and ground speed.
Wind direction is dependent on the NAV Angle system unit setting.
If wind speed is zero, wind direction displays as dashes.
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Planning
RAIM Prediction
Determine GPS coverage availability for the current location or a
specified waypoint at any time and date. RAIM performs checks to
ensure the navigator has adequate satellite geometry during flight.
NOTE
RAIM availability prediction is for use in areas where WAAS coverage is not
available. It is not required in areas where WAAS coverage is available.
FEATURE REQUIREMENTS
• Active flight plan and off-route direct-to waypoint (arrival date and time)
FEATURE LIMITATIONS
FAA’s TSO requirements for non-precision approaches specify significantly greater
satellite coverage than is required during other phases of flight. As a result, RAIM
may not be available for all approaches.
RAIM prediction results are valid for up to 90 days from the current date. Arrival
dates beyond 90 days, or in the past, may not provide accurate results.
This feature predicts the availability of fault detection integrity. It cannot predict the
availability of LPV or L/VNAV approaches.
Use a non-GPS based approach when RAIM is not available. To determine WAAS
availability, including for LPV approaches, visit the FAA’s NOTAM service.
4.5
RAIM Prediction Page
The RAIM feature can help you plan for a
pending flight by confirming GPS operation
before an approach.
RAIM Features
• Automatically monitors RAIM during approach operations and warns when
RAIM is not available
• Near 100% availability in Oceanic, En route, and Terminal phases of flight
• Waypoint Identifier, Arrival Date, and Arrival Time setup keys
• Compute RAIM key
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GPS 175/GNX 375 Pilot’s Guide
4-11
Planning
4.5.1
Calculating RAIM Status
Calculate RAIM availability for the specified waypoint, date,
and time. Prediction results annunciate once the calculation is
complete.
WAYPOINT SEARCH OPTIONS
A Waypoint Identifier key allows you to specify a destination airport using multiple
search options.
ARRIVAL DATE & TIME
These setup controls allow you to set the expected date and time of arrival at the
specified airport. Values default to the current date and time in the absence of an
active flight plan and off-route direct-to waypoint.
CHECK RAIM AVAILABILITY
1. Specify a destination waypoint.
2. Specify the expected arrival date and time.
3. Tap Compute RAIM.
4.5.2
RAIM Status Indications
Dashes indicate when the destination waypoint is invalid.
ANNUNCIATION
DESCRIPTION
Computing
Status is pending.
RAIM Available
RAIM is available at the specified waypoint.
RAIM Unavailable
RAIM is not available at the specified waypoint.
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Hazard Awareness
5
Hazard Awareness
WEATHER AWARENESS
5.1
5.2
5.3
5.4
5.5
5.6
5.7
Data Transmission Limitations ................................................................5-3
FIS-B Weather Display ............................................................................5-5
FIS-B Weather Setup ..............................................................................5-6
FIS-B Weather Interactions .....................................................................5-7
FIS-B Weather Products..........................................................................5-8
Raw Text Reports.................................................................................5-16
FIS-B Ground Reception Status.............................................................5-18
TRAFFIC AWARENESS
5.8
5.9
5.10
5.11
5.12
5.13
Traffic Applications ..............................................................................5-19
Traffic Display ......................................................................................5-21
Traffic Setup ........................................................................................5-25
Traffic Interactions ...............................................................................5-27
Traffic Annunciations...........................................................................5-28
Traffic Alerting.....................................................................................5-29
TERRAIN AWARENESS
5.14
5.15
5.16
5.17
5.18
5.19
Terrain Configurations .........................................................................5-31
Database Limitations............................................................................5-33
Terrain Display .....................................................................................5-34
Terrain Setup .......................................................................................5-35
Terrain Proximity..................................................................................5-36
Terrain Alerting ...................................................................................5-39
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5-1
Hazard Awareness
HAZARD AWARENESS
APPS & FUNCTIONS
Menu selections vary based on features and optional equipment installed with
Garmin avionics.
[1]
5-2
GPS 175: Feature availability dependent upon unit configuration. Requires external ADS-B In
product (GDL 88, GTX 345) and FIS-B.
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Hazard Awareness
Weather Awareness
WARNING
DO NOT RELY SOLELY ON DATALINK WEATHER FOR WEATHER INFORMATION.
DATALINK WEATHER PROVIDES A SNAPSHOT IN TIME. IT MAY NOT ACCURATELY
REFLECT THE CURRENT WEATHER SITUATION.
NOTE
Datalink weather is not intended to replace weather briefings or in-flight
weather reports from AFSS or ATC.
FEATURE REQUIREMENTS
• GPS 175 with UAT receiver (GDL 88, GTX 345) and FIS-B
OR
• GNX 375 and FIS-B
The FAA provides FIS-B as a Surveillance and Broadcast Service operating on the UAT
(978 MHz) frequency band. FIS-B uses a network of FAA-operated ground-based
transceivers to transmit weather datalink information to the aircraft’s receiver on a
scheduled continuous basis.
The Flight Information Service-Broadcast (FIS-B) Weather service is freely available
for aircraft equipped with a capable datalink universal access transceiver (UAT).
Ground stations provide uninterrupted services for the majority of the contiguous
U.S., Hawaii, Guam, Puerto Rico, and parts of Alaska. No weather subscription
service is required. For the latest FAA ground station coverage information, visit:
www.faa.gov/nextgen/programs/adsb/
5.1
Data Transmission Limitations
FIS-B broadcasts provide weather data in a repeating cycle which may take several
minutes to completely transmit all available weather data. Therefore, not all weather
data may be immediately present upon initial FIS-B signal acquisition.
5.1.1
Line of Sight Reception
To receive FIS-B weather information, the aircraft’s datalink receiver must be within
range and line-of-sight of an operating ground-based transceiver. Reception may be
affected by altitude, terrain, and other factors. Per the FAA, much of the United
States has FIS-B In airborne coverage at and above 3,000 feet AGL. Terminal
coverage is available at altitudes below 3,000 feet AGL and is available when flying
near approximately 235 major U.S. airports. Surface coverage allows FIS-B ground
reception at approximately 36 major U.S. airports.
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5-3
Hazard Awareness
5.1.2
Per FAA TSO-C157b
FIS-B information may be used for pilot planning decisions focused on updating the
pilot's awareness of the dynamic flight environment; including avoiding areas of
inclement weather that are beyond visual range and pilot near-term decisions where
poor visibility precludes visual acquisition of inclement weather. FIS-B weather and
NAS status information may be used as follows:
a. To promote pilot awareness of ownship location with respect to reported
weather, including hazardous meteorological conditions; NAS status indicators
to enhance pilot planning decisions; and pilot near-term decision-making.
b. To cue the pilot to communicate with Air Traffic Control, Flight Service Station
specialist, operator dispatch, or airline operations control center for general and
mission critical meteorological information, NAS status conditions, or both.
FIS-B information, including weather information, NOTAMs, and TFR areas, are
intended for the sole purpose of assisting in long-/near-term planning and
decision making. The system lacks sufficient resolution and updating capability
necessary for aerial maneuvering associated with immediate decisions. In
extreme scenarios, the oldest weather radar data on the display can be up to
15 to 20 minutes older than the display’s age indication for that weather radar
data. Therefore, do not attempt to use FIS-B weather information to maneuver
the aircraft at minimum safe distances from hazardous weather.
FIS-B information must not be used in lieu of a standard preflight briefing.
c. FIS-B uplink is a subscription-free FIS broadcast managed by FAA SBS. It provides
an FAA approved source for METAR, TAF, WINDS, PIREPs, NEXRAD, AIRMET,
SIGMET, and TFR information, and is subject to the broadcast range limits for
these products.
FIS-B uplink is not an FAA approved source for NOTAMs.
5.1.3
NOTAM 30-Day Limitation
NOTAMs received via FIS-B may not be a complete listing. Active NOTAMs are
removed from the FIS-B data stream 30 days after issuance. Before flight, review all
necessary aeronautical and meteorological information from official sources.
For more information, consult AC 00-63A or latest revision.
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Hazard Awareness
5.2
FIS-B Weather Display
FIS-B weather data displays on the dedicated weather page and as
overlays on Map. No pilot action is required to receive FIS-B weather
information.
1
2
7
3
4
5
6
FIS-B WX Page
1
Aircraft Symbol
Depicts current aircraft position and orientation.
• Tip represents actual aircraft location
• Symbol type is dependent upon configuration
• Absent if a GPS source is not available
2
North Indicator
Indicates True north.
Page Orientation Label
• North Up orients page to True north
3
• Track Up orients page to current aircraft GPS track
• Heading Up orients page to current aircraft heading
(requires heading data source interface)
4
Basemap
Presents a graphical depiction of land and water data.
5
NEXRAD Controls
Includes source key and animation control. Source options include
CONUS, Regional, or Combined.
6
Zoom Scale
Value adjusts with changes to the current magnification.
7
Product Timestamp
Approximate time of data collection for each active weather product.
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5-5
Hazard Awareness
5.3
FIS-B Weather Setup
Tap Menu to access weather setup
options. This page also provides access
to the FIS-B Status page, where
controls for enabling/disabling the
FIS-B function, viewing raw text
reports, and checking ground
reception status reside.
Map WX Overlays
Overlay controls reside in the Map
setup menu.
Home > Map > Menu > Select from
NEXRAD, METAR, and TFR.
FIS-B WEATHER ENABLED
To mitigate any possibility of the avionics receiving unexpected
data formats in the FIS broadcast, you may disable FIS-B Weather
by toggling the FIS-B Enabled key to off.
This key is active by default. It is not intended for use under
normal broadcast conditions.
From the setup menu, tap FIS-B WX Status > FIS-B Enabled.
This function is also accessible from the ADS-B Status page:
Home > System > ADS-B Status > FIS-B WX Status > FIS-B Enabled
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Hazard Awareness
5.4
FIS-B Weather Interactions
WX INFO BANNER
Tapping any weather icon displays an information banner. When applicable,
a pop-up window displays additional data.
WX Info Banner
Banner Information:
• Pan mode symbol
• Bearing and distance to map
pointer from aircraft’s
current position
LEGENDS
A scrollable legend provides relevant product colors and symbols. Definitions are
organized by product function.
1. Tap Menu > Legend.
2. Use the inner knob to
view the available
product legends.
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5-7
Hazard Awareness
5.5
FIS-B Weather Products
When available, FIS-B weather products display as follows.
WEATHER DISPLAY
FIS-B WEATHER
PRODUCT
FIS-B
WX PAGE
WX
POP-UP
TEXT
MAP
PAGE
APT
INFO
RAW
TEXT
REPORT
AIRMET
METAR w/Decoding
NEXRAD
NOTAM-D
NOTAM-FDC
PIREP
SIGMET
TAF
Temps Aloft
TFR
Winds Aloft
Product Present
5.5.1
Product Status
View the status of all FIS-B weather
products. States include:
• Unavailable
• Awaiting Data
• Data Available
From the FIS-B menu, tap FIS-B WX Status.
This page is also accessible from the ADS-B Status page.
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Hazard Awareness
5.5.2
Product Age
NOTE
Data contained within a composite weather product may be olderthan its
weather product age and should never be considered current.
A timestamp identifies the approximate time of data collection for each weather
product. For quick reference, the age of each active weather product is calculated
and shown in a color-coded side bar on the FIS-B Weather page.
TIMESTAMP COLOR DEFINITIONS
Yellow
Weather product considered stale. Its age is older than
half its expiration time.
A weather product may be amber when its issue date and
time occurs in the future by more than the complete
expiration time for the requested weather product
(e.g., some TFRs).
Green
Weather product considered current. Its age is newer than
half its expiration time.
Tapping timestamp window displays the time for all green
colored weather products.
Gray
Weather product data is one of the following:
• Expired
• Not received
• Not supported at the selected altitude
“No Data” or “ALT UNAVBL” displays next to the weather
product title
FIS-B weather product update and transmission intervals are published in the
SBS Description Document associated with TSO-C157b. This information is
available electronically at the FAA’s Regulatory and Guidance Library:
https://rgl.faa.gov/
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5-9
Hazard Awareness
5.5.3
FIS-B NEXRAD
WARNING
NEVER USE NEXRAD WEATHER FOR MANEUVERING IN, NEAR, OR AROUND
AREAS OF HAZARDOUS WEATHER. NEXRAD IMAGES ARE SNAPSHOTS OF PAST
WEATHER DATA. THEY ARE NOT SAFE FOR USE AS REAL TIME DEPICTIONS OF
NEARBY WEATHER ACTIVITY.
CONUS NEXRAD
Regional NEXRAD
NEXRAD weather radar displays a mosaic of precipitation data, colored according to
reflectivity. Composite reflectivity images depict the highest radar energy received
from multiple antenna tilt angles at various altitudes. Base reflectivity images depict
radar returns from the lowest antenna tilt angle. Per AC 00-63A, FIS-B CONUS and
Regional NEXRAD are composite reflectivity images.
The precipitation intensity level reflected by each pixel represents the highest level of
composite radar reflectivity data sampled in that location.
A clear understanding of ground-based Doppler weather radar capabilities will
allow you to interpret the NEXRAD weather imagery in the safest way possible.
The National Oceanic and Atmospheric Administration hosts a description of the
technology on its website: https://www.weather.gov/jetstream/doppler_intro
RADAR DATA ANIMATIONS
To depict trending weather movements over time, an animation
function stitches the last three to six received radar images together
in sequence, from oldest to newest, and replays them on a
continuous loop.
Play and stop controls are active when three or more NEXRAD images
are available for playback.
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Hazard Awareness
CONUS & REGIONAL NEXRAD
FIS-B NEXRAD is uplinked to the aircraft as two separate weather products:
CONUS and Regional NEXRAD. Both products display individually or simultaneously,
separated by a white hash-marked boundary, based on source selection.
Regional
Echo Block
Regional
Boundary
CONUS
Echo Block
CONUS & Regional NEXRAD
Combined
Depending on the locations of
received FIS-B ground stations,
Regional NEXRAD coverage
can extend as far as 250 nm
around an aircraft’s position.
Aircraft flying at higher
altitudes typically receive data
from more ground stations
than aircraft flying at low
altitudes.
FIS-B NEXRAD does not
differentiate between liquid
and frozen precipitation types.
Source options are selectable from the weather setup menu or the NEXRAD key at
the bottom left of the FIS-B Weather page. The key label changes to reflect the active
source.
CONUS
CONUS
Regional
Combined
• Large, low-resolution weather image for the entire
continental U.S.
• Pixels are 7.5 min (7.5 nm = 13.89 km) wide by 5 min
(5 nm = 9.26 km) wide
• High-resolution weather image with limited range, centered
around each broadcasting ground station
Regional
• Pixels are 1.5 min (1.5 nm = 2.78 km) wide by 1 min
(1 nm = 1.852 km) tall
• Each weather pixel varies with latitude. Above 60º latitude,
pixel block width doubles to 3 min/nm for regional maps
Combined
• Both CONUS and Regional NEXRAD images display
simultaneously
• White hash mark indicates regional boundary
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Hazard Awareness
5.5.4
METARs and TAFs
METAR and TAF reports provide information on current and forecast conditions.
Colored METAR flags display when a METAR reporting station is matched with a
corresponding navigation database identifier.
When selected, the METAR is decoded and displayed above the original METAR text.
METARs are provided only in areas covered by the navigation database currently
loaded.
METAR SYMBOLS
VFR
Ceiling greater than 3000 ft AGL and visibility greater than five miles.
Marginal VFR
Ceiling 1000 to 3000 ft AGL and/or visibility three to five miles.
IFR
Ceiling 500 to 1000 ft AGL and/or visibility one to three miles.
Low IFR
Ceiling below 500 ft AGL and/or visibility less than one mile.
Unknown
Ceiling and/or visibility data unavailable.
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Hazard Awareness
5.5.5
AIRMETs
The AIRMET overlay draws the geographical boundaries of received AIRMETS on the
dedicated weather page. AIRMETS include advisories of weather that may be
particularly hazardous to single engine, light aircraft and VFR pilots.
Tapping an AIRMET opens a detailed report.
AIRMET TYPES
Icing
• Areas of moderate airframe icing including areal extent
Turbulence
• Areas of moderate turbulence including vertical extent
IFR
• Weather conditions with ceilings <1,000 ft and/or
visibility <3 mi
MTN OBSR
• Widespread mountain obscuration due to clouds,
precipitation, smoke, haze, mist, or fog
Surface Winds
• Sustained surface winds >30 kt and/or potential
non-convective wind shear below 2,000 ft AGL
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Hazard Awareness
5.5.6
SIGMETs
The SIGMET overlay draws the geographical boundaries of received SIGMETs on the
dedicated weather page. Convective and non-convective SIGnificant METerological
Information combine in a textual report and display graphically for the observed or
forecast region.
Tapping a SIGMET opens a detailed report.
5.5.7
PIREPs
PIREPs are pilot-generated weather reports that may contain non-forecast adverse
weather conditions, such as low in-flight visibility, icing conditions, wind shear, and
turbulence.
PIREP SYMBOLS
Routine (UA)
Urgent (UUA)
PIREPs are issued as either Routine (UA) or
Urgent (UUA). Tapping a PIREP symbol displays
textual details.
Route
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Hazard Awareness
5.5.8
Winds/Temps Aloft
Indicates wind speed and direction,
and temperature forecast for the
specified altitude.
Altitude range: surface to 45,000 ft
The wind barb extends outward from
the reporting location dot in the
direction of wind origination.
Plus and minus keys adjust altitude for altitude-based
weather products.
Not all altitudes provide winds/temps aloft forecasts for all regions.
5.5.9
TFRs
WARNING
DO NOT EXCLUSIVELY USE DATALINK SERVICES FOR TFR INFORMATION. TFR
DEPICTIONS MAY NOT BE A COMPLETE LISTING AND MAY VARY BETWEEN
COCKPIT DEVICES. ALWAYS CONFIRM TFR INFORMATION WITH OFFICIAL
SOURCES SUCH AS FLIGHT SERVICE STATIONS OR AIR TRAFFIC CONTROL.
TFRs identify areas of airspace where aircraft are temporarily restricted from
operating. They are routinely issued for occurrences such as dignitary visits, military
activities, and forest fires.
Tapping a TFR displays textual details.
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Hazard Awareness
5.6
Raw Text Reports
View raw textual data for a FIS-B
product.
1. Open the FIS-B WX Status page.
2. Tap Raw Text Reports.
3. Select a weather product.
The latest uploaded
data for the product
displays on a dedicated
page.
Multiple reporting
stations appear in a list.
Tapping View displays
raw text for the
corresponding
identifier.
To view information
about products not
available due to a
service outage, select
Unavailable Products.
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Hazard Awareness
READING WINDS/TEMPS ALOFT REPORTS
Tapping Winds/Temps Aloft displays a forecast of winds and temperatures for
different altitudes. Temperature forecasts are not included for altitudes below
2,500 ft AGL.
On the raw text report, altitude values do not align with the corresponding forecast.
Match the color of the altitude and forecast to interpret the information.
Color markings are for reference only.
ALTITUDE (FT)
3,000
2118
6,000
9,000
12,000
18,000
2327+0 2526-02 2628-07 2633-08
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24,000
30,000
34,000
39,000
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5.7
FIS-B Ground Reception Status
FEATURE REQUIREMENTS
• UAT transceiver (powered)
• FIS-B Enabled function active
Monitor FIS-B ground station transmission status from the
FIS-B Reception page. A current report lists completeness of
NOTAM-TFR, AIRMET, and SIGMET data for all received
ground stations.
For the received ground station, the
station range field indicates
complete/incomplete status only for
those products within the ground
station’s range.
1. Open the FIS-B WX Status page.
2. Tap Radio Stations.
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Hazard Awareness
Traffic Awareness
FEATURE REQUIREMENTS
• GPS 175 with External ADS-B In product (GDL 88, GTX 345)
OR
• GNX 375
FEATURE LIMITATIONS
• Available functions and alerting features are dependent upon the ADS-B
traffic system source
ADS-B Features
• Runway and taxiway depiction during SURF mode
(< 2 nm range scale)
• Selectable traffic icons display intruder and vector information
• Customizable motion vectors (type, duration)
5.8
Traffic Applications
FEATURE REQUIREMENTS
• Aviation database (SURF only)
FEATURE LIMITATIONS
• ATAS does not alert to traffic on ground
ADS-B In traffic support three applications:
AIRB: Basic Airborne Application
ATAS: ADS-B Traffic Advisory System
SURF: Surface Situation Awareness
AIRB is considered the fundamental airborne traffic application. ATAS provides
alerts when airborne traffic trajectories pose a potential collision risk.
SURF provides additional situational awareness when you are on ground or
within the terminal environment.
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Hazard Awareness
TRAFFIC APPLICATIONS
• Both active when ADS-B is “On”
(airborne traffic indications are available; ATAS arms to
provide airborne alerts)
AIRB & ATAS
• Alerts occur when potential collision risks are determined
based on current airborne position and trajectory and the
position and trajectories of other airborne traffic
• Airborne traffic alerts only
(no alerts on ground or for traffic on the ground)
• Nominally allow 20 to 40 seconds for flight crew response
• Provide aural alerting when traffic alerts occur
• Active on ground or within the terminal environment
(<5 nm and <1,500 ft above field elevation)
• Traffic on ground may display when SURF is active
SURF
• Runway and taxiway depictions when the zoom scale is
<2 nm (Traffic page only)
• Depicts only traffic and ground vehicles equipped with
ADS-B Out
5.8.1
Traffic Application Failures
During normal operation, the “ADS: On” status annunciation means that both AIRB
and ATAS applications are active. In the rare event of an application failure, it is
possible that only one of the applications may be active. The unit provides indications
to reflect which application is no longer operational.
• ADS field indicates “On”
• If AIRB is active and ATAS is failed, the unit displays the system message:
“ADS-B traffic alerting function inoperative”
• If AIRB is failed and ATAS is active (and still capable of providing a no-bearing
aural alert), “Unavailable” annunciates across the traffic display
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Hazard Awareness
5.9
Traffic Display
Collision avoidance and traffic surveillance data display on the
dedicated Traffic page and as overlays on Map.
The Traffic page displays intruding traffic in relation to the current
position and altitude of the aircraft without clutter from other data.
1
2
9
3
4, 5, 6
7
8
Traffic Page
1
Ownship Icon
Depicts current aircraft position.
• Nose of the ownship is the actual ownship location
• Unlike the configured aircraft symbol on map displays, ownship icon
is always a directional arrow
ADS-B Status & Active Applications
• ADS-B indications:
• On means the AIRB and ATAS traffic applications are active
• Off means that air and ground applications are inactive
2
• Test means the traffic test function is active
• Fail means that ADS-B reports a failure
• Ground station transmitter status icon
• +SURF means that ground targets displays in addition to
airborne targets
• Altitude filter setting (NORM, ABV, BLW, UNR)
3
Page Orientation Label
• Track Up orients page to current aircraft GPS track
• Heading Up orients page to current aircraft heading
(requires heading data source interface)
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Hazard Awareness
4
Intruding Aircraft Symbol
Actual intruder location varies according to symbol type.
• Tip of directional symbols
• Center of non-directional symbols
5
Altitude Separation Value
Indicates when an intruder is above or below the ownship.
• Value appears above or below the traffic symbol, depending on
relative altitude
• Plus or minus sign denotes higher or lower altitude in hundreds
of feet
6
Vertical Trend Arrow
Active when an intruder is climbing or descending at a vertical speed
greater than 500 fpm.
7
Selected Vector Type and Duration
Types: Absolute and Relative
For more about motion vectors, read section 5.10.1.
8
Range Ring
• Outer ring represents selected range
• Range options vary according to traffic application
9
Selected Traffic Information Window & Next Key
Select and view aircraft information for multiple traffic symbols.
For more about traffic interactions, read section 5.10.
GROUND STATION TRANSMITTER STATUS ICON
TIS-B ground station transmitter is
providing a traffic picture specific to
the ownship aircraft.
Traffic picture may be incomplete in
the vicinity of the ownship. A partial
traffic picture may be available due to:
• aircraft-to-aircraft ADS-B and/or
• traffic pictures from the ground
station customized for other
nearby aircraft
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Hazard Awareness
TRAFFIC UNITS
PARAMETER
UNITS
Altitude
ft
Distance
nm
Traffic units are always uniform.
Selections on the System Units page do
not affect the traffic display.
ADS-B TRAFFIC SYMBOLS
Traffic Information is for advisory use only. The pilot is responsible for identifying and
avoiding traffic conflict.
Basic Directional
Proximate Directional
Basic Non-directional
Proximate Non-directional
Basic Off-scale
Selected
Proximate Off-scale
Selected
Directional
(On-Ground)
Non-directional Alerted
Non-directional
(On-Ground)
Off-scale Non-directional
Alerted Traffic
Proximate Directional
(On-Ground)
Directional Alerted Traffic
Proximate
Non-directional
(On-Ground)
Off-scale Directional
Alerted Traffic
Directional Surface
Vehicle
Non-directional Surface
Vehicle
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Hazard Awareness
TRAFFIC GROUPS
When the Traffic Grouping function is active, traffic within close proximity of each
other may display as a group.
• Asterisk indicates that the target belongs to a group
• Relative proximity of the closest target determines color
• Depiction is of the most immediate threat
OFF SCALE TRAFFIC ALERTS
Off scale (out of range) traffic alerts are depicted as half yellow
symbols on the outermost range ring at the correct bearing.
TRAFFIC OVERLAY STATUS ICON (MAP ONLY)
This icon appears on Map when the traffic overlay is active. It is
absent when the overlay function is off.
Map Traffic Overlay
An “X” appears over the icon when the overlay in on but unavailable.
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Hazard Awareness
5.10 Traffic Setup
Tap Menu to access pilot selectable
settings as well as the self-test and ADS-B
display functions.
Map Traffic Overlay
The overlay control resides in the
Map setup menu.
Home > Map > Menu > Select
Traffic.
ADS-B Display
Enable AIRB/ATAS. Depending on the state of the aircraft,
the system may additionally select SURF.
Selecting Off disables the ADS-B In function.
Test
Initiate a test of the traffic system. A test pattern displays on
the page. System returns to normal operating mode once
the test is complete. [1]
Motion Vector
Select motion vector type. Selecting Off removes all motion
vectors from the display.
Options: • Absolute • Relative • Off
Vector Duration
Select the amount of time represented by the endpoint.
Options range from 30 seconds to 5 minutes.
A longer duration results in a longer vector.
Altitude Filter
Select filter range.
Options: • Normal • Above • Below • Unrestricted
Traffic Grouping
Show targets in close proximity as a group. When active, the
highest priority target is displayed. Asterisk indicates one or
more targets are decluttered by grouping.
[1]
Available only when aircraft is on ground (i.e., standby mode) and ADS-B Display is off.
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Hazard Awareness
5.10.1
Motion Vectors
FEATURE LIMITATIONS
• Motion vectors display on the Traffic page only
A motion vector is a line extending from the nose of an intruder icon. Its orientation
represents the intruder’s direction and movement.
A yellow vector indicates when traffic meets intruding TA criteria (i.e., closing rate,
distance, vertical separation).
MOTION VECTOR TYPES
• White vector
• Depicts intruder ground track
• Calculations based on intruder direction and ground speed
Absolute
• Endpoint depicts intruder’s position over the ground at the
end of the selected duration
• Airborne and ground functionality
• Green vector
• Depicts intruder movement relative to the ownship
• Calculations based on track and ground speed of both
intruder and ownship
Relative
• Endpoint depicts intruder’s location relative to the ownship
at the end of the selected duration
• Airborne functionality only
• “Relative Motion - Unavailable” annunciates during
ground operations
5.10.2
Altitude Filtering
Pilot selectable filters limit the display of traffic to a specific altitude range relative to
the altitude of the ownship.
Filter selections apply to both the Traffic page and the traffic overlay on Map.
SELECTION
5-26
LABEL
ALTITUDE RANGE
Normal
NORM
-2,700 ft to 2,700 ft
Above
ABV
-2,700 ft to 9,900 ft
Below
BLW
-9,900 ft to 2,700 ft
Unrestricted
UNR
-9,900 ft to 9,900 ft
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Hazard Awareness
5.11 Traffic Interactions
Selected Traffic
Information
• Registration/call sign
• Vehicle type
Selecting a traffic symbol displays information
about the aircraft in the upper right corner of
the page.
Selections remain active through altitude
filtering, zoom scale, and page changes.
• Closure rate
• Track
• Ground speed
Tapping Next repeatedly steps through multiple symbols spaced
closely together.
Selected
Traffic
Selected
Traffic
Info
Next Key
When a traffic alert occurs, the Mute Alert option temporarily
replaces the Next key.
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Hazard Awareness
5.12 Traffic Annunciations
ANNUNCIATION
DESCRIPTION
Absolute Motion - XX
SEC/MIN
Active motion vector type is absolute and vector time
is XX seconds/minutes.
Failed
ADS data failure.
No Data
Unit is not receiving valid traffic data.
No GPS Position
ADS-B LRU detects that GPS is initializing.
Relative Motion - XX
SEC/MIN
Active motion vector type is relative.
Relative Motion UNAVAILABLE
Aircraft is not airborne and the active motion vector
type is relative.
Unavailable
Necessary traffic data not available.
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5.13 Traffic Alerting
Traffic Alert Types
• Textual annunciations at the
bottom of the screen
Traffic alerts occur anytime there is an
increase in the number of traffic
advisories. They remain active until the
area is clear of all TAs.
• Color-coded target icons on
Traffic page
• Pop-up window when
another page is active
FEATURE LIMITATIONS
• Aural traffic alerts available on GNX 375 only
• Mute alert function is applicable only to the active aural alert
(does not mute future alerts)
Traffic Pop-up
ANNUNCIATION
Traffic Alert Annunciation
ALERT TYPE | POP-UP | CONDITION |
VOICE MESSAGE
Alert Type: Caution
Pop-up Alert: Yes
Condition:
TRAFFIC
• Traffic reports a traffic advisory
Voice Message:
• Message content depends on current traffic
system configuration
To silence the active traffic alert voice message, tap Mute Alert.
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Hazard Awareness
ALERTING PARAMETERS
Alerting Parameter
Considerations
• Altitude separation and trend
• Angle
• Speed
• Closure rate of each aircraft
(ownship and target)
5-30
Traffic alerting parameters consider
several factors in order to allow you
enough time to acquire the target and
maneuver the aircraft away from
conflicting traffic.
To minimize nuisance alerts, traffic
alerting sensitivity is adaptive, based on
altitude above ground level. No aural
alerts are given below 500 ft.
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Hazard Awareness
Terrain Awareness
WARNING
DO NOT USE TERRAIN AND OBSTACLE DATA TO NAVIGATE OR MANEUVER
AROUND TERRAIN. THEY ARE AN AID TO SITUATIONAL AWARENESS ONLY.
FEATURE REQUIREMENTS
All terrain functions require the following components to operate properly.
• Valid 3-D GPS position for terrain and obstacle data display
• Valid terrain/obstacle database
FEATURE LIMITATIONS
• Alerting functions are dependent upon the configured terrain alerting
options
• Terrain Alerting functions do not provide aural alerts
5.14 Terrain Configurations
Available Terrain Modes
• Terrain Proximity
• Terrain Alerting (FLTA/PDA)
Terrain Proximity displays relative
elevations on moving map depictions
(Terrain page, Map). It does not
provide visual alerts.
Terrain Alerting adds Forward Looking Terrain Alert (FLTA) and Premature Descent
Alert (PDA) functions. These include visual alerts when the aircraft flies below an
alerting threshold.
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Hazard Awareness
5.14.1
GPS Altitude for Terrain
FUNCTIONAL REQUIREMENTS
GPS altitude is derived from satellite measurements. To acquire an accurate 3-D fix
(latitude, longitude, altitude), a minimum of four operating satellites must be in view
of the GPS receiver antenna.
The terrain system uses GPS altitude and position data to:
• Create a 2-D image of surrounding terrain and obstacles relative to the
aircraft’s position and altitude
• Calculate the aircraft’s flight path in relation to surrounding terrain and
obstacles
• Predict hazardous terrain conditions and issue alerts
GSL ALTITUDE & INDICATED ALTITUDE
The unit converts GPS altitude data to GSL altitude (i.e., the geometric altitude
relative to MSL) for use in terrain functions. All Terrain page depictions and elevation
indications are in GSL.
Variations between GSL altitude and the aircraft’s corrected barometric altitude (or
indicated altitude) are common. As a result, Terrain page altitude data may differ
from current altimeter readings. Both GSL altitude and indicated altitude represent
height above MSL, but differ in accuracy and reliability.
GSL ALTITUDE
INDICATED ALTITUDE
• Highly accurate and reliable
geometric altitude source
• Barometric altitude source
corrected for pressure variations
• Does not require local altimeter
settings to determine height
above MSL
• Requires frequent altimeter
setting adjustment to determine
height above MSL
• Not subject to pressure and
temperature variations
• Subject to local atmospheric
conditions
• Affected primarily by satellite
geometry
• Affected by variations in pressure,
temperature, and lapse rate
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5.15 Database Limitations
NOTE
Garmin cross-validates terrain and obstacle data in accordance with
TSO-C151c. However, the information should never be considered
all-inclusive. Database inaccuracies or omissions may exist.
Terrain and obstacle data are not available when the aircraft is operating outside of
the installed database coverage area.
Garmin obtains terrain and obstacle data from government sources and cannot
independently verify the accuracy and completeness of the information. Pilots must
familiarize themselves with the appropriate charts and other data for safe flight.
DATABASE
Terrain
LIMITATION
• Not available north of 89º N latitude and south of
89º S latitude
• Coverage areas vary according to database type
• Power line indications for the contiguous United States and
small parts of Canada and Mexico
Obstacle
• Regional definitions may change without notice
• May not contain uncharted obstacles
• May include power lines or only HOT lines depending on
database type [1]
[1]
HOT lines are power lines that share location with other obstacles identified by the FAA.
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5.16 Terrain Display
Terrain, obstacle, and wire data display as overlays on the
dedicated Terrain page and as overlays on Map.
2
3
4
1
5
6
Terrain Page
1
Ownship Icon
Depicts current aircraft position.
2
GSL Altitude
Displays current GPS height above mean sea level.
3
North Indicator
Indicates True north.
Page Orientation Label
• Track Up orients page to current aircraft GPS track
4
• Heading Up orients page to current aircraft heading
(requires heading data source interface)
Heading Up takes priority over Track Up when both orientation inputs
are available.
5-34
5
Legend
Shows color designations for terrain and obstacle relative altitude
ranges.
6
Terrain Overlay Icon
Indicates power line or obstacle presence at the current zoom scale.
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Hazard Awareness
AUTOMATIC ZOOM
In the event an alert occurs, the page
automatically zooms to provide the best
depiction of that alerted terrain, obstacle,
or power line.
AUTOMATIC DATA REMOVAL
Automatic removal of obstacle and power line data
occurs at range scales greater than 10 nm.
5.17 Terrain Setup
Tap Menu to access pilot selectable
settings as well as self-test and alert
inhibit functions.
Map Terrain Overlays
Overlay controls reside in the Map
setup menu.
Home > Map > Menu > Select from
Terrain and OBST/Wires.
Terrain Inhibit
View
• Inhibits visual alerts for terrain, obstacles, and power
lines
• 360 changes view format to a 360º ring encircling the
aircraft (default view)
• Arc changes view format to a forward-looking 120º arc
Flight Plan
• Toggles the active flight plan overlay on or off
(Terrain page only)
Legend
• Toggles the Terrain and Obstacle/Wire legend on or off
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5.18 Terrain Proximity
FEATURE LIMITATIONS
• Terrain and obstacle depictions are relative to aircraft altitude.
• Obstacle depictions are dependent upon database
• Does not provide visual or aural alerts
View color depictions of terrain and obstacle elevations relative to your current
position and altitude.
Terrain Proximity Features
• Non-TSO C151c certified terrain display system
• 2-D graphical representation of surrounding terrain, obstacles, and power lines
relative to aircraft position and altitude
• Declutter automatically removes obstacle and power line data at large ranges
• Continuous monitoring of database validity, GPS and hardware status
• Displays when higher level terrain functions are active
5.18.1
Terrain Elevation Depictions
Color shading depicts terrain elevations relative to the aircraft’s position and altitude.
Colors automatically adjust as the aircraft’s altitude changes.
1
2
3
Terrain Shading
1
5-36
Red
2
Yellow
GPS 175/GNX 375 Pilot’s Guide
3
Black
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5.18.2
Obstacle Elevation Depictions
FEATURE LIMITATIONS
• Obstacles more than 2,000 ft below current altitude do not display
TOWER OBSTACLES
UNLIGHTED
OBSTACLE
<1000’
AGL
>1000’
AGL
LIGHTED
OBSTACLE
<1000’
AGL
>1000’
AGL
OBSTACLE LOCATION
Red obstacle is above or within 100 ft
below current altitude.
Yellow obstacle is between 100 ft and
1000 ft below current altitude.
White obstacle is between 1,000 ft and
2,000 ft below current altitude.
WIND TURBINE OBSTACLES
UNLIGHTED
WIND
TURBINE
OBSTACLE
LIGHTED
WIND
TURBINE
OBSTACLE
OBSTACLE LOCATION
Red obstacle is above or within 100 ft
below current altitude.
Yellow obstacle is between 100 ft and
1,000 ft below current altitude.
White obstacle is more than 1,000 ft below
current altitude.
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POWER LINE OBSTACLES
OBSTACLE
POWER LINE OBSTACLE LOCATION
Red power line is above or within 100 ft below current
altitude.
Yellow power line is between 100 ft and 1,000 ft below
current altitude.
White power line is between 1,000 ft and 2,000 ft below
current altitude.
OBSTACLE GROUPS
An asterisk indicates when the obstacle database contains only a single
latitude and longitude for a group of obstacles. This occurrence is rare.
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5.19 Terrain Alerting
Receive visual alerts for potential flight path conflicts involving terrain, obstacles, or
power lines. Alerting behavior is determined at installation.
Terrain Alerting Features
• Non-TSO C151c certified terrain alerting system
• FLTA functions: RTC, RLC, ROC, ITI, ILI, and IOI
• Premature Descent alerts
• Terrain depictions and display overlays
• Cautions and warnings indicate alert severity and threat type
• Textual annunciations
• Pop-up alerts
• Threat location indication on Terrain page and Map
• Self-test and alert inhibit functionality
5.19.1
Alert Types
Available alerting functions depend on the installed terrain system.
ALERT TYPE
CONDITION
Imminent Impact
[1]
Aircraft reaches the minimum clearance altitude of any
obstacle (IOI), terrain (ITI), or power line (ILI) in the
projected flight path.
Reduced
Clearance [1]
Aircraft’s vertical flight path is projected to be within the
minimum clearance altitude of an obstacle (ROC), terrain
(RTC), or power line (RLC).
Premature
Descent [2]
Aircraft is significantly below the normal approach path
for the nearest runway.
• Altitude is <700 ft above terrain
• Distance from destination airport is 15 nm or less
[1]
[2]
Alerting inhibited <200 ft AGL within 0.5 nm of approach runway or <125 ft AGL within 1.0
nm of runway threshold.
Alerting inhibited within 0.5 nm of approach runway or <125 ft AGL within 1.0 nm of runway
threshold. Alerting thresholds for final descent are based on current position, speed, and flight
path data.
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
5-39
5.19.2
Alerting Thresholds
FLIGHT PHASE
MINIMUM CLEARANCE ALTITUDE
LEVEL FLIGHT
DESCENDING
En Route
700 ft
500 ft
Terminal
350 ft
300 ft
Approach
150 ft
100 ft
Departure
100 ft
100 ft
Height Above Terrain (ft)
PDA THRESHOLD
Runway
Threshold
INTENTIONALLY LEFT BLANK
Distance from Destination Airport (nm)
Alerting Area
5-40
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Hazard Awareness
5.19.3
Inhibiting FLTA & PDA Alerts
NOTE
Always use discretion when inhibiting FLTA or PDA alerts. Re-activate the
alert function when appropriate.
The Terrain Inhibit control is accessible via the
terrain pop-up alert or Terrain page menu.
Inhibit Mode
Annunciation
INHIBITS
INHIBIT
AUTOMATIC
INHIBIT
Runway surface and minimum length settings
impact the terrain alerting criteria when
considering potential runways.
FUNCTION
Manually inhibits FLTA or PDA visual alerts for low altitude
approaches.
Automatically inhibits FLTA alerts when the aircraft meets the
following approach criteria.
• Altitude <200 ft above runway elevation
• Position <0.5 nm off approach end or between each
runway end
Tapping Terrain Inhibit generates a
pop-up. Confirm the request to inhibit
terrain alerts.
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
5-41
Hazard Awareness
5.19.4
FLTA & PDA Alerts
Terrain Alert Types
• Textual annunciations at the
bottom of the screen
• Color-coded graphics on
Terrain page and Map
• Pop-up window when
another page is active
Terrain Pop-up
ANNUNCIATION
Terrain Alert Annunciation
ALERT TYPE | POP-UP | CONDITION
Alert Type: Caution
Pop-up Alert: N/A
TER FAIL
Condition:
• Terrain reports a system failure
• The database is missing or corrupt
Alert Type: Advisory
TER INHB
Pop-up Alert: N/A
Condition:
• Terrain reports alert inhibit mode active
Alert Type: Caution
Pop-up Alert: N/A
Condition:
TER N/A
• No GPS position
• Degraded GPS signal
• Aircraft is outside of the terrain database
regional coverage
5-42
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Hazard Awareness
ANNUNCIATION
ALERT TYPE | POP-UP | CONDITION
Alert Type: Caution
Pop-up Alert: Yes
TERRAIN
Condition:
• Reduced Required Terrain Clearance
• Imminent Terrain Impact
• Premature Descent
Alert Type: Advisory
TER TEST
Pop-up Alert: N/A
Condition:
• Terrain system test is in progress
Alert Type: Caution
Pop-up Alert: Yes
OBSTACLE
Condition:
• Reduced Obstacle Clearance
• Imminent Obstacle Impact
Alert Type: Warning
Pop-up Alert: Yes
Condition:
• Reduced Required Terrain Clearance
PULL UP
• Imminent Terrain Impact
• Reduced Obstacle Clearance
• Imminent Obstacle Impact
• Reduced Line Clearance
• Imminent Line Impact
Alert Type: Caution
Pop-up Alert: Yes
WIRE
Condition:
• Reduced Line Clearance
• Imminent Line Impact
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
5-43
INTENTIONALLY LEFT BLANK
5-44
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Messages
6
Messages
ADVISORY MESSAGES
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
6.11
6.12
Message Key .........................................................................................6-2
Airspace Advisories ................................................................................6-2
Database Advisories...............................................................................6-3
Flight Plan Advisories .............................................................................6-4
GPS/WAAS Advisories............................................................................6-6
Navigation Advisories.............................................................................6-8
Pilot Specified Advisories........................................................................6-9
System Hardware Advisories ................................................................6-10
Terrain Advisories ................................................................................6-13
Traffic System Advisories......................................................................6-14
VCALC Advisories ................................................................................6-17
Waypoint Advisories ............................................................................6-17
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
6-1
Messages
Advisory Messages
Advisories are system-related messages relative to the display.
• Most recent advisories appear at the
top of list
• View-once advisories remain in
queue until viewed by the pilot
• Persistent (or conditional) advisories
remain active until the indicated
condition is resolved
All advisories are logged in the unit’s internal storage. This log may be exported to an
SD card.
6.1
Message Key
This key displays at the left edge of the screen when an advisory
condition is present. Tapping the key once displays an advisory list.
Tapping it again acknowledges all active advisories and closes the list.
• Flashes when a new advisory is present
• Turns solid once all active advisories are acknowledged
• No longer displays after all active advisories are cleared
6.2
Airspace Advisories
Alerted airspace types are based on pilot settings in the Airspace Alerts page.
These advisories are informational only. No action is necessary.
ADVISORY
6-2
CONDITION
AIRSPACE ALERT - Inside
airspace.
Aircraft is inside the airspace.
AIRSPACE ALERT - Airspace
within 4 nm and entry in less
than 10 minutes.
Airspace is within 4nm of the path and
projected to enter in less than 10 minutes.
AIRSPACE ALERT - Airspace
entry in less than 10 minutes.
Aircraft is projected to enter the airspace in less
than 10 minutes.
AIRSPACE ALERT - Within
4 nm of airspace.
Airspace is less than 4 nm from the aircraft. May
not be projected to enter the airspace.
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Messages
6.3
Database Advisories
ADVISORY
CONDITION
CORRECTIVE ACTION
<Terrain/Obstacle>
database not
available.
The indicated database
is unavailable or corrupt.
Re-download and install the
indicated database. Contact a
Garmin dealer for support.
Terrain display
unavailable for
current location.
Terrain database cannot
provide elevation at the
current GPS position.
Aircraft is outside the
database coverage area.
Load appropriate coverage
area onto the external
datacard.
Verify user-modified
procedures in
stored flight plans
are correct.
Navigation database
updates and the stored
flight plan contains
user-modified
procedures.
Verify the procedures are
correct.
Verify airways in
stored flight plan
are correct.
The stored flight plan
contains an airway that
is inconsistent with the
current navigation
database.
Verify all airways are correct.
If necessary, reload airways to
the stored flight plan routes.
A procedure has
been modified in a
cataloged flight
plan.
Database update causes
flight plan to exceed
100 waypoint limit.
Procedure is removed or
truncated as a result.
Verify cataloged flight plan
and procedures are correct. If
necessary, reload procedures
to the stored flight plan
routes.
Aircraft in area with
large mag var.
Verify all course
angles.
Magnetic variation
flagged as unreliable in
the MagVar database.
Typically occurs when
operating at high
latitudes that do not
support a magnetic
NAV angle.
Verify that the geographical
region supports navigation
based on magnetic variation.
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
6-3
Messages
6.4
Flight Plan Advisories
ADVISORY
CONDITION
CORRECTIVE ACTION
Flight plan import
failed.
Unit unable to decode
flight plan contents.
Wireless import of the
requested flight plan not
possible.
Check for proper operation
of all necessary
components. If the problem
persists, contact dealer for
service.
Flight plan import
failed. Catalog is
full.
The flight plan catalog is
full. Wireless import of the
requested flight plan not
possible.
Delete any unnecessary
flight plans from the
catalog.
<#> new imported
flight plan(s)
available for
preview.
Unit receives the specified
number of flight plans via
the import function. They
are available for viewing
on the Preview page.
No action necessary.
Current navigation
database no longer
contains a stored flight
plan waypoint.
Verify all stored cataloged
flight plans and procedures.
Modify stored flight plans
as necessary to include
waypoints that are in the
current navigation
database.
Stored flight plan
waypoint has
changed location.
A waypoint in a stored
flight plan moved by more
than 0.33 arc minutes
from its previous position.
Verify stored cataloged
flight plans and procedures.
Modify stored flight plans
as necessary to include
waypoints that are in the
current navigation
database.
Steep turn. Aircraft
may overshoot
course during turn.
The flight plan contains an
acute course change
ahead. Following the
guidance requires a bank
in excess of normal. If
coupled, the autopilot may
not be able to execute the
steep turn.
Slowing the aircraft may
shallow the turn.
Stored flight plan
waypoint is not in
current navigation
database.
6-4
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Messages
ADVISORY
CONDITION
CORRECTIVE ACTION
Changes to active
route are disabled.
Unit receives a flight plan
from G3X Touch, but the
External FPL Crossfill
function is off.
Enable the External FPL
Crossfill function.
Home > System > Setup >
External FPL Crossfill.
GDU disconnected.
External flight plan
crossfill inoperative.
Communication with the
G3X Touch is lost.
Verify that the GDU is on.
Contact dealer for service.
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
6-5
Messages
6.5
GPS/WAAS Advisories
ADVISORY
CONDITION
CORRECTIVE ACTION
<Unit> GPS receiver
has failed. Check
GPS coax for
electrical short.
Internal communication
to the WAAS board is
inoperative.
Use a different GPS receiver
or a non-GPS based source of
navigation. Contact dealer
for service.
GPS/WAAS board
reports LOI. Antenna
may be shaded from
satellites.
Ensure the aircraft is clear of
hangars, buildings, trees, etc.
Use a different GPS receiver
or a non-GPS based source of
navigation. If the problem
persists, contact dealer for
service.
GPS navigation lost
due to insufficient
satellites. Use other
navigation source.
GPS position lost due to
lack of satellites.
Wait for GPS satellite
geometry to improve. Ensure
the aircraft has a clear view
of the sky. Use a different
GPS receiver or a non-GPS
based source of navigation.
Contact dealer for service.
GPS navigation lost
and may have
erroneous position.
Use other
navigation source.
GPS position lost due to
erroneous position.
Use a different GPS receiver
or a non-GPS based source of
navigation. Contact dealer
for service.
Abort Approach.
GPS approach is no
longer available.
GPS approach not
available. GPS unable to
provide approach level
of service (i.e., LPV,
LNAV, LNAV+V, or
L/VNAV).
Initiate a climb to the MSA or
other published safe altitude,
abort the approach, and
execute a non-GPS based
approach.
Approach not
active. Approach
guidance not
available.
GPS approach could not
transition to active (e.g.,
the unit remains in TERM
as it does not have the
required HPL/VPL for
LNAV).
Abort the approach and then
execute a non-GPS based
approach.
GPS approach
downgraded.
Use LNAV minima.
Approach downgraded
from LPV or LNAV/VNAV
to an LNAV approach.
Vertical guidance no
longer available.
Continue to fly the approach
using published LNAV
minimums.
GPS loss of integrity
(LOI). Verify GPS
position with other
navigation
equipment.
6-6
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Messages
ADVISORY
CONDITION
GPS searching sky.
Ensure GPS antenna
has unobstructed
view of the sky.
WAAS board is acquiring
position and may take
longer than normal.
Typically occurs when
the unit is powered on
after installation or being
off for several weeks.
No action necessary.
Low internal GPS
clock battery.
WAAS board indicates
that its clock battery is
low. May experience
delay when attempting
to acquire GPS position.
Almanac data may be
lost.
Contact dealer for service.
GPS receiver needs
service.
WAAS board is reporting
that it requires service.
GPS module may
continue to function.
Use a different GPS receiver
or a non-GPS based source of
navigation. Contact dealer
for service.
190-02207-02 Rev. B
CORRECTIVE ACTION
GPS 175/GNX 375 Pilot’s Guide
6-7
Messages
6.6
Navigation Advisories
ADVISORY
Set Course on
CDI/HSI to
<current DTK>.
6-8
CONDITION
The selected course on
the CDI/HSI does not
match the current
desired track.
NOTE: This advisory is
not provided when
interfaced to a
composite type CDI.
CORRECTIVE ACTION
Set the CDI/HSI selected
course to the current desired
track.
Holding EFC time
has expired.
It is past the specified
Expected Further
Clearance time for the
user-defined hold.
No action necessary.
Consider contacting ATC as
appropriate.
True north
approach. Verify
NAV angles are
referenced to True
north (ºT).
The loaded procedure
references true north
and the active leg has a
published true north
reference.
Verify the NAV angle is set to
True north.
Magnetic north
approach. Verify
NAV angles are
referenced to
Magnetic north.
The loaded approach is
magnetic, but the NAV
angle reference is not.
Change NAV angle setting to
Magnetic.
NAV angles are
referenced to True
north (ºT).
NAV angle is set to True.
No action necessary.
NAV angles are
referenced to a user
set value (ºU).
NAV angle is set to User.
No action necessary.
Non-WGS84
Waypoint. See
pilot’s guide.
Location may be
different than
where surveyed for
<WPT>.
The active waypoint
does not reference the
WGS84 datum.
No action necessary.
For more information, read
“Points About Non-WGS84
Waypoints” in this section.
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Messages
Points About Non-WGS84 Waypoints
• There are several types of geodetic datums that a waypoint can reference.
• TSO-C146 requires that all waypoints reference the WGS84 datum, but allows
for navigation to coordinates not compliant with this standard as long as the
pilot is notified of the potential difference in location.
• Not all waypoints in the navigation database reference the WGS84 datum.
For some of these coordinates the reference datum is unknown. In such cases,
the “Non-WGS84 Waypoint” advisory displays.
• Garmin cannot determine the exact proximity of a non-compliant waypoint to
the WGS84 datum in use by the system. Typically, the distance is < 2 nm.
• Most non-WGS84 waypoints are outside of the United States.
6.7
Pilot Specified Advisories
These advisories display when the associated timer expires or reaches a preset value.
They are informational only. No action is necessary.
ADVISORY
CONDITION
CORRECTIVE ACTION
SCHEDULED
MESSAGE - <Text>.
The custom message
timer expired.
Acknowledge message.
Edit Message key provides
direct access to scheduled
message options.
Timer has expired.
The generic timer is past
its preset value.
Acknowledge message.
Timers key provides direct
access to the generic
clock/timer function.
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
6-9
Messages
6.8
System Hardware Advisories
ADVISORY
CONDITION
<Unit> knob-push
stuck.
Dual concentric inner
knob is stuck.
CORRECTIVE ACTION
1. Push the inner knob
again. If it remains stuck,
use the corresponding
touchscreen controls.
2. Contact dealer if the
problem persists.
• Unit detects a cooling
fan fault.
• Coloration may be
incorrect.
<Unit> cooling fan
failed.
• Backlight may dim to
reduce power and
heat.
Extended operation at high
temperatures is not
recommended as damage to
the unit may occur. Contact
dealer for service.
<Unit> over temp.
Reducing backlight
brightness.
Unit temperature
exceeds the over
temperature threshold.
Backlight dims to reduce
power and heat.
Decrease cabin temperature
and increase cabin airflow
near the unit. If the problem
persists, contact dealer for
service.
<Unit> under temp.
Unit temperature is
below the normal
operating temperature
threshold.
If the problem persists,
contact dealer for service.
Pilot stored data
was lost. Recheck
settings.
An error occurred in the
pilot stored data. The
following user settings
may be lost.
• Map menu settings
• User waypoints
Recheck settings.
• Catalog flight plans
• User field settings
• Unit convention
selection
Remote Go Around
key is stuck.
6-10
System detects the
remote go around
key/switch depressed for
at least 30 seconds. It
will now ignore this
input.
GPS 175/GNX 375 Pilot’s Guide
Press the key/switch again.
If it remains stuck, contact
dealer for service.
190-02207-02 Rev. B
Messages
ADVISORY
CONDITION
CORRECTIVE ACTION
Transponder 1/2
overtemp.
GTX 345 1/2 reports that
its internal temperature
exceeds the over
temperature threshold
(GPS 175 only).
Decrease cabin temperature
and increase cabin airflow
near the transponder. If the
problem persists, contact
dealer for service.
Transponder 1/2
under temp.
GTX 345 1/2 reports that
its internal temperature
is below the normal
operating threshold
(GPS 175 only).
If the problem persists,
contact dealer for service.
<Unit> needs
service.
Loss of calibration data.
GPS175 cannot
communicate with its
configuration module or
other hardware.
GNX 375 experiences a
fault related to one of
the following.
• ADS-B/Nav
communication
Contact dealer for service.
• Altitude encoder
calibration
• Audio ROM
• Configuration
module
• Non-volatile memory
• Suppression bus
The SD card is
unreadable or corrupt
(i.e., data is unavailable).
<Unit> SD card is
invalid or failed.
2. Re-insert the SD card in
the slot.
3. Contact dealer if the
problem persists.
User ejects
Flight Stream 510
wireless datacard.
Network connection is
lost.
190-02207-02 Rev. B
1. Reformat the SD card
using an external
computer.
Restart unit to reconnect.
GPS 175/GNX 375 Pilot’s Guide
6-11
Messages
ADVISORY
CONDITION
CORRECTIVE ACTION
1. Reformat the SD card
using an external
computer.
<Name> log
encountered an
error when
exporting.
Export failure. May occur
for WAAS or traffic logs.
<Name> log has
exported
successfully.
Export to SD card
successful. May occur for
WAAS or traffic logs.
No action necessary.
Heading source
inoperative or
connection lost.
<Unit> is not receiving
heading information
from any source.
Heading up map
orientation not available.
Contact dealer for service.
Pressure altitude
source inoperative
or connection lost.
<Unit> is not receiving
pressure altitude data
from any source.
Contact dealer for service.
Press "Enable APR
Output" before
selecting APR on
autopilot.
Approach guidance is
available from the
connected
KAP 140/KFC 225
autopilot.
Before engaging approach
mode on the autopilot, tap
the Enable APR Output key.
ADS-B Out fault.
Pressure altitude
source inoperative
or connection lost.
For GNX 375, or
GPS 175 configured to
receive ADS-B In data
from GTX 345:
Transponder loses
communication with the
pressure altitude source.
Contact dealer for service.
6-12
2. Re-insert the SD card in
the slot.
3. Contact dealer if the
problem persists.
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Messages
ADVISORY
Transponder has
failed.
CONDITION
For GNX 375, or
GPS 175 configured to
receive ADS-B In data
from GTX 345:
Transponder detects an
internal failure.
Functionality may be
unavailable.
Possible causes:
• 1090ES ADS-B Out
failure
CORRECTIVE ACTION
Contact dealer for service.
• Transponder failure
• Communication with
the transponder is
lost
Transponder is
operating in ground
test mode.
For GNX 375, or
GPS 175 configured to
receive ADS-B In data
from GTX 345:
Transponder is being
forced airborne for
ground test.
Cycle power to the GNX 375
once ground test completes.
ADS-B is not
transmitting
position.
For GNX 375:
Transponder is not
receiving a valid GPS
position.
If the problem persists,
contact dealer for service.
<Unit> demo
mode.
The unit is in demo
mode. Do not use for
navigation.
Power cycle the unit to exit
demo mode.
6.9
Terrain Advisories
ADVISORY
CONDITION
Terrain alerts are
inhibited. Re-enable
alerts in the Terrain
menu.
Pilot enables terrain alert
inhibit function.
190-02207-02 Rev. B
CORRECTIVE ACTION
Open Terrain menu and
deselect Terrain Inhibit.
GPS 175/GNX 375 Pilot’s Guide
6-13
Messages
6.10 Traffic System Advisories
6.10.1
Traffic Advisories, GPS 175
ADVISORY
CONDITION
CORRECTIVE ACTION
1090ES traffic
receiver fault.
ADS-B LRU unable to
receive 1090 Extended
Squitter traffic.
Service required.
Contact dealer for support.
ADS-B Out fault.
Check transponder
is in correct mode.
GDL 88 reports a control
panel input failure.
Verify transponder is in the
correct mode. Contact dealer
if message persists.
GDL 88 is unable to
transmit ADS-B
messages due to a
failure occurring with
one of the following:
• GPS position
ADS-B failure.
Unable to transmit
ADS-B messages.
• ICAO address
verification
• UAT transmitter
• UAT broadcast
• Bottom antenna
• Bottom and top
antenna (GDL 88D
only)
Service required.
Contact dealer for support.
ADS-B LRU reports one
of the following
conditions.
ADS-B fault.
GDL 88 needs
service.
• Low battery
ADS-B traffic
alerting function
inoperative.
ADS-B LRU reports a
CSA or TSAA/ATAS
failure.
6-14
• Fan fault
• GDL 88D fault with
only one antenna
operational
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Messages
ADVISORY
ADS-B traffic
function
inoperative.
Traffic/FIS-B
functions
inoperative.
CONDITION
ADS-B LRU reports a
failure with the ADS-B
Traffic input.
ADS-B LRU reports a
critical fault and is
inoperative.
Communication with the
ADS-B LRU is lost.
UAT traffic/FIS-B
receiver fault.
ADS-B LRU unable to
receive UAT traffic and
FIS-B data.
GDL 88
configuration
module needs
service.
GDL 88 cannot
communicate with its
configuration module.
190-02207-02 Rev. B
CORRECTIVE ACTION
Service required.
Contact dealer for support.
GPS 175/GNX 375 Pilot’s Guide
6-15
Messages
6.10.2
Traffic Advisories, GNX 375
ADVISORY
CONDITION
1090ES traffic
receiver fault.
Unit is unable to receive
1090 Extended Squitter
traffic.
ADS-B traffic
alerting function
inoperative.
TSAA application reports
it is unavailable to run.
CORRECTIVE ACTION
Unit reports a failure
with the ADS-B Traffic
input. Possible causes:
ADS-B traffic
function
inoperative.
• ADS-B/ADS-R/TIS-B
input fault
• ADS-B In electrical
fault
• All installed traffic
applications report as
“Unavailable to Run”
or
“Unavailable - Fault”
Traffic/FIS-B
functions
inoperative.
ADS-B In configuration
data fault (configuration
parameters are invalid)
UAT traffic/FIS-B
receiver fault.
Unit unable to receive
UAT traffic and FIS-B
data.
6-16
Service required.
Contact dealer for support.
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Messages
6.11 VCALC Advisories
ADVISORY
CONDITION
CORRECTIVE ACTION
Approaching top of
descent.
User configured a
vertical descent
calculation, and the
aircraft is within
60 seconds of the
calculated top of
descent.
No action necessary.
Arriving at VCALC
target altitude.
User configured a
vertical descent
calculation, and the
aircraft is approaching
target altitude.
No action necessary.
6.12 Waypoint Advisories
ADVISORY
CONDITION
CORRECTIVE ACTION
User waypoint
import failed.
User waypoint import
failed due to improper
file format.
Ensure media has the correct
file format. If the problem
persists, contact dealer for
service.
User waypoint
import failed. User
waypoint database
is full.
User waypoint catalog is
full. Import of the
requested user
waypoints could not
complete.
Delete any unnecessary user
waypoints from the catalog
and try again.
User waypoints
were imported
successfully.
User waypoint import
successful.
No action necessary.
User waypoints
imported
successfully existing waypoints
reused.
User waypoint import
successful. Import
function reuses existing
user waypoints instead
of creating duplicates.
No action necessary.
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
6-17
INTENTIONALLY LEFT BLANK
6-18
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Qualification
7
Qualification
NOTE
The procedures described in this section are not authorized for completion
during flight. All tasks must be performed while the aircraft is on the
ground.
7.1
Glove Qualification
The touchscreen uses capacitive touch technology to sense the proximity of skin to
the display. A glove creates a barrier between the skin and the display glass,
potentially reducing the ability of the display to detect touches.
This procedure qualifies a specific glove for use with the touchscreen. Due to
differences in finger size and glove size, the qualification procedure is specific to the
pilot/glove combination. Multiple units must be evaluated individually.
GLOVE SELECTION CONSIDERATIONS
• Thinner gloves perform better than thicker gloves.
• Leather gloves, and gloves designed specifically for use with capacitive
touchscreen devices, are often found to be acceptable.
• To improve touchscreen sensitivity while wearing gloves, use the pad of your
finger instead of the tip during touch interactions.
GLOVE QUALIFICATION GUIDANCE
• Checklist 1 contains the tasks required to qualify a glove.
• Checklist 2 contains tasks that are not required to qualify a glove, but may
limit how some functions are accessed while wearing a glove.
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
7-1
Qualification
GLOVE QUALIFICATION STEPS
Complete only the tasks for the capabilities relevant to the installed navigator.
1.
Sit in the pilot’s seat.
2.
Start the unit in normal mode.
3.
Perform the tasks listed in each checklist, tapping the specified keys with a
non-gloved finger. It is not necessary to record any results for this step.
4.
Repeat step 3 using a gloved hand.
5.
For each task, determine whether the touchscreen response is the same or
worse than without the glove.
6.
Record the results in the applicable column. Items that may cause the
operation to be worse include, but are not limited to:
• Multiple attempts to select a key
• Unintentional selection of adjacent key(s)
• Excessive force on the touchscreen to select a key
7.
If all applicable tasks produce the same response with and without a glove,
the pilot may use the glove in flight.
GLOVE QUALIFICATION PROCEDURE
Pilot:
Glove Description:
Circle the applicable navigator.
GPS 175
7-2
GNX 375
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Qualification
CHECKLIST 1
REQUIRED TASKS
OPERATION WITH GLOVE
(CIRCLE ONE)
TASK
Starting from the Home page:
Waypoint
Same
Worse
Type the airport identifier “KSLE.”
Same
Worse
Enter
Same
Worse
Flight Plan
Same
Worse
Add Waypoint
Same
Worse
Type the airport identifier “KSLE.”
Same
Worse
Enter
Same
Worse
Return to the Home page.
Add each of the following waypoints in the same manner.
KMMV
Same
Worse
KONP
Same
Worse
BTG
Same
Worse
Select BTG.
Same
Worse
Load Airway
Same
Worse
V23
Same
Worse
ALFOR
Same
Worse
Load
Same
Worse
Scroll the list of flight plan waypoints up and
down.
Same
Worse
Back
Same
Worse
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
7-3
Qualification
CHECKLIST 2
NON-REQUIRED TASKS
TASK
OPERATION WITH GLOVE
(CIRCLE ONE)
Open the Active Flight Plan page.
Same
Worse
With one finger on the page, drag the waypoint
list up and down.
Same
Worse
With one finger, swipe the list up and down.
Same
Worse
Back
Same
Worse
Graphically Edit FPL
Same
Worse
Drag KONP to an empty area of the map,
panning and zooming as necessary. Observe
that KONP is removed from the flight plan.
Same
Worse
Drag the leg between KMMV and BTG to KSPB.
Observe that KSPB is added to the flight plan.
Same
Worse
Open the Map page.
7-4
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Glossary
8
Glossary
A
ACT
Altitude Compensated Tilt
ADAHRS
Air Data/Attitude & Heading Reference System
ADC
Air Data Computer
ADIZ
Air Defense Identification Zone
ADS-B
Automatic Dependent Surveillance Broadcast
AFM
Aircraft Flight Manual
AFMS
Aircraft Flight Manual Supplement
AGL
Above Ground Level
AHRS
Attitude Heading Reference System
AIM
Airman’s Information Manual
AIRB
Basic Airborne Application
ALT
Altitude Hold
AP
Autopilot
ARTCC
Air Route Traffic Control Center
AR
Approval Required
ASOS
Automated Service Observing System
ATAS
ADS-B Traffic Advisory System
ATC
Air Traffic Control
ATIS
Automatic Terminal Information Service
ATK
Along Track
AWOS
Automated Weather Observing Station
C
CDI
Course Deviation Indicator
CDU
Control and Display Unit
CRS
Course
CTAF
Common Traffic Advisory Frequency
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
8-1
Glossary
D
DG
Directional Gyro
DME
Distance Measuring Equipment
E
EDR
Excessive Descent Rate
EFC
Expected Further Clearance
ENR
En Route
ESP
Electronic Stability and Protection
F
FAF
Final Approach Fix
FDC
Flight Data Center
FIS-B
Flight Information Services Broadcast
FLTA
Forward Looking Terrain Avoidance
FMS
Flight Management System
FPL
Flight Plan
FPM
Feet Per Minute
FSS
Flight Service Station
G
GCS
Ground Clutter Suppression
GDC
Garmin Air Data Computer
GDL
Garmin Data Link
GDU
Garmin Display Unit
GFC
Garmin Flight Controller
GP
Glidepath
GPS
Global Positioning System
GPSS
Global Positioning System Steering
8-2
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Glossary
GRS
Garmin Reference System
GS
Glideslope
GSL
Geometric Sea Level
GSU
Garmin Sensing Unit
GTP
Garmin Temperature Probe
H
HDG
Heading
HOT
Hazardous Obstacle Transmission
HPL
Horizontal Protection Level
HSDB
High Speed Data Bus
I
IAF
Initial Approach Fix
IAS
Indicated Airspeed
IAT
Induction Air Temperature
IFR
Instrument Flight Rules
IGRF
International Geomagnetic Reference Field
ILI
Imminent Line Impact
ILS
Instrument Landing System
INT
Intersection
IOI
Imminent Obstacle Impact
ISA
International Standard Atmosphere
ITI
Imminent Terrain Impact
K
KIAS
Knots Indicated Airspeed
L
LDI
Lateral Deviation Indicator
LOA
Letter of Authorization
LOC
Localizer
LRU
Line Replaceable Unit
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
8-3
Glossary
M
MAP
Missed Approach Point
MAHP
Missed Approach Holding Point
MDA
Minimum Descent Altitude
METAR
Meteorological Terminal Aviation Routine Weather Report
MOA
Military Operations Area
MSL
Mean Sea Level
N
NAVAID
Navigation Aid
NCR
Negative Climb Rate
NDB
Non-Directional Beacon
NEXRAD
Next-Generation Radar
O
OAT
Outside Air Temperature
OBS
Omni Bearing Selector
OCN
Oceanic
P
PCL
Pilot Controlled Lighting
PDA
Premature Descent Alert
PRF
Pulse Repetition Frequency
PVT
Position, Velocity, and Time
R
RAIM
Receiver Autonomous Integrity Monitoring
RF
Radius to Fix
RLC
Reduced Line Clearance
RNAV
Area Navigation
RNP
Required Navigation Performance
ROC
Reduced Required Obstacle Clearance
RTC
Reduced Required Terrain Clearance
8-4
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
Glossary
S
SAT
Static Air Temperature
SBAS
Satellite-Based Augmentation System
SBS
Surveillance and Broadcast Services
SD
Secure Datacard
SSID
Service Set Identifier
STAR
Standard Terminal Arrival
SURF
Surface Situation Awareness
SVID
Satellite-Vehicle Identification
T
TA
Traffic Advisory
TAF
Terminal Aerodrome Forecast
TAS
Traffic Advisory System
TAT
Total Air Temperature
TCAD
Traffic Alert and Collision Avoidance Devices
TCAS
Traffic Alert and Collision Avoidance System
TCH
Threshold Crossing Height
TERM
Terminal
TFR
Temporary Flight Restriction
TIS
Traffic Information Service
TSAA
Traffic Situational Awareness with Alerting
TSO
Technical Standard Order
U
UTC
Universal Time Coordinated
190-02207-02 Rev. B
GPS 175/GNX 375 Pilot’s Guide
8-5
Glossary
V
VCALC
Vertical Calculator
VDI
Vertical Deviation Indicator
VFR
Visual Flight Rules
VLOC
VOR/Localizer
VNAV
Vertical Navigation
VOR
Very High Frequency Omni-directional Range
VPL
Vertical Protection Level
VRP
Visual Reporting Point
VS
Vertical Speed
W
WAAS
Wide Area Augmentation System
WPT
Waypoint
X
XPDR
8-6
Transponder
GPS 175/GNX 375 Pilot’s Guide
190-02207-02 Rev. B
190-02207-02 Rev. B
190-02207-02 Rev. B
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