Garmin | GTN™ 750 | Garmin GTN™ 750 GTN 725/750 SW v6.60 Upgrade Supplement

Garmin GTN™ 750 GTN 725/750 SW v6.60 Upgrade Supplement
GTN 725/750 SOFTWARE v6.60
PILOT’S GUIDE UPGRADE SUPPLEMENT
This supplement contains the pages revised in the GTN 725/750 Pilot’s Guide,
P/N 190-01007-03, Rev. R, regarding the new features of software v6.60. Change bars
are placed adjacent to the revised information as described in the revision summary table.
This supplement, in combination with the GTN 725/750 Pilot’s Guide,
P/N 190-01007-03, Rev. Q is equivalent to the GTN 725/750 Pilot’s Guide,
P/N 190-01007-03, Rev. R.
Current documents are available at flyGarmin.com.
Printed copies may be purchased by contacting Garmin Customer Support.
NOTE: Depending on which version of software is installed and how
it is configured, the actual features and screen images may differ from
what is shown. For more information regarding feature availability
for specific software versions refer to the GTN 725/750 Pilot’s Guide,
P/N 190-01007-03.
GTN 725/750 SW v6.60 Pilot’s Guide Upgrade Supplement
190-01007-1A Rev. A
© 2019
Garmin International, Inc. or its subsidiaries
All Rights Reserved
Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated,
downloaded or stored in any storage medium, for any purpose without the express written permission of Garmin.
Garmin hereby grants permission to download a single copy of this manual and of any revision to this manual onto a
hard drive or other electronic storage medium to be viewed for personal use, provided that such electronic or printed
copy of this manual or revision must contain the complete text of this copyright notice and provided further that any
unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited.
This manual reflects the operation of system software v6.60 or later. Some differences in operation may be observed
when comparing the information in this manual to later software versions.
Garmin®, FliteCharts®, and SafeTaxi® are registered trademarks of Garmin International or its subsidiaries. Garmin
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trademarks may not be used without the express permission of Garmin.
NavData® is a registered trademark of Jeppesen, Inc.
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© 2019 SiriusXM® Satellite Radio, Sirius, SXM and all related marks and logos are trademarks of SiriusXM Radio Inc.
All other marks and logos are property of their respective owners. All rights reserved.
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The term Wi-Fi® is a registered trademark of the Wi-Fi Alliance®.
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For information regarding the Aviation Limited Warranty, refer to Garmin’s website.
For aviation product support, visit flyGarmin.com.
GTN 725/750 SW v6.60 Pilot’s Guide Upgrade Supplement 190-01007-1A Rev. A
GTN 725/750 Pilot’s Guide Revision R, Change Summary
Section
Page
9.1.2
9-13
9-15
9-26
9.1.2.1
Description
Section 9 – Map
Added “Selected ALT Range Arc” to figure 9-13.
Added “Selected ALT Range Arc” to table 9-1.
Added “Selected ALT Range Arc” description.
Section 10 – Traffic
10.6.2
10-26
Changed 9,000 feet to “9,900” feet, two places in paragraph.
Section 12 – Weather
12.1.1
12.1.18
12-3
12-8
12-9
12-26
12.4
12-45
12.4.1
12.4.2
12.6
12-46
12-47
12-73
12.1.5
12.6.1
12-74
12.6.2
12-75
12-75
12.6.2.2
12-77
12.6.2.3
12.6.4
12.6.5
12.6.7
12.6.8
12.6.9
12.6.10
12-79
12-80
12-82
12-83
12-85
12-86
12-88
12-89
Updated figure 12-5, “SiriusXM Weather Menu.”
Rewrote third paragraph for clarity.
Updated key icon, figure 12-9, figure 12-10, and added note.
Added figure 12-41, “Icing Legend.”
Added information about GWX radars.
Updated selections for “Mode” in figure 15-29, “Weather Radar
Functional Diagram.”
Updated figure 12-61, “Weather Radar Precipitation Scale.”
Updated figure 12-62, “Weather Radar Mode Selection.”
Updated figure 12-94, “FIS-B Weather Functional Diagram.”
Added information about similarities between weather products
and updated figure 12-96, “FIS-B Weather Data Link Menu.”
Updated figure 12-96, “FIS-B Weather Data Link Menu.”
Updated “FIS-B NEXRAD” section.
Updated callouts in figure 12-99, “FIS-B CONUS & Regional
NEXRAD Combined.”
Updated figure 12-100, “FIS-B Reception Unavailable.”
Updated figure 12-101, “NEXRAD Source Selection.”
Added “Cloud Tops” section.
Updated figure 12-105, “FIS-B Lightning.”
Changed heading to “FIS-B SIGMETS and Textual AIRMETS.”
Added “Graphical AIRMETS” section.
Added “Center Weather Advisory” section.
Updated figure 12-115, “Winds Aloft.”
GTN 725/750 SW v6.60 Pilot’s Guide Upgrade Supplement 190-01007-1A Rev. A
Section
12.6.11
12.6.12
12.6.13
Page
12-90
12-91
12-92
Description
Added “Icing” section.
Added “Turbulence” section.
Added “FIS-B PIREPs” section.
Section 16 – System
16.4.6.3
16-27
Added “GTN-G3X Crossfilling” section.
Section 17 – Messages
17
17-11
Added two “Flight Plan Import” messages concerning the G3X.
GTN 725/750 SW v6.60 Pilot’s Guide Upgrade Supplement 190-01007-1A Rev. A
Orientation
North Up Above
Visual APPR Sel
Auto Zoom
Auto Zoom Min
Auto Zoom Max
Track Vector Length
Altitude Constraints
Nav Range Ring
Fuel Range Ring
Fuel Reserve Time
Topo Scale
Point Obstacle Rng
Wire Obstacle Rng
Chart Color
Selected ALT Range Arc
Restore Defaults
Airport Range
SafeTaxi Diagrams
Runway Extensions
Intersection Range
NDB Range
VOR Range
VRP Range
User Waypoint Range
Airway Range
TFRs
Restore Defaults
Road Detail
City Detail
State/Province
Names
River/Lake Detail
Restore Defaults
Smart Airspace
Show Airspaces
Class B/TMA Range
Class C/TCA Range
Class D Range
Restricted Range
MOA (Military) Range
Other/ADIZ Range
Restore Defaults
Range
Type
Restore Defaults
Weather Source
Cell Movement
METAR
Cloud Tops
Echo Tops
Lightning
Restore Defaults
9.1.2
Map Setup
190-01007-03 Rev. R
Foreword
GTN 725/750 Pilot’s Guide
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Figure 9-13 Map Setup Functional Diagram
Appendix
9-13
Index
9.1.2.1
Map
The Map option defines the behavior and display of information on the Map
page such as: Orientation, North Up Above, Auto Zoom, Nav Range Ring, Topo
Scale, Obstacle Range, and Restore Defaults. The default values are shown in
bold type.
Feature
Selection
North Up, Track Up, Heading Up
Off, 10 NM, 15 NM, 25 NM, 40 NM, 50 NM, 75 NM,
North Up Above
100 NM, 150 NM, 250 NM
Off, 2.5 NM, 4 NM, 5 NM, 7.5 NM, 10 NM, 15 NM,
Visual APPR Selector
25 NM
Auto Zoom
Off, On
250 ft, 400 ft, 500 ft, 750 ft, 1000 ft, 1500 ft, 2500 ft,
0.5 NM, 0.75 NM, 1 NM, 1.5 NM, 2.5 NM, 4 NM, 5
Auto Zoom Min
NM, 7.5 NM, 10 NM, 15 NM, 25 NM, 40 NM, 50 NM,
75 NM, 100 NM, 150 NM, 250 NM, 400 NM
250 ft, 400 ft, 500 ft, 750 ft, 1000 ft, 1500 ft, 2500 ft,
0.5 NM, 0.75 NM, 1 NM, 1.5 NM, 2.5 NM, 4 NM, 5 NM,
Auto Zoom Max
7.5 NM, 10 NM, 15 NM, 25 NM, 40 NM, 50 NM,
75 NM, 100 NM, 150 NM, 250 NM, 400 NM
Track Vector Length
Off, 30 SEC, 60 SEC, 2 MIN, 5 MIN, 10 MIN, 20 MIN
Altitude Constraints
Off, Selected Only, Selected & Active, All
Nav Range Ring
Off, On, Enhanced
Fuel Range Ring
Off, On
Fuel Reserve Time
30 Min, 45 Min, 60 Min, 90 Min
Topo Scale
Off, On
Point Obstacle Range
Off, 4 NM, 5 NM, 7.5 NM, 10 NM, 15 NM
Wire Obstacle Range
Off, 1 NM, 1.5 NM, 2.5 NM
Chart Color Scheme
Day, Night
Selected ALT Range Arc Off, On
Restore Defaults
Returns values to original factory settings
Orientation
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Table 9-1 Map Setup Map Options
Appendix
190-01007-03 Rev. R
GTN 725/750 Pilot’s Guide
9-15
Index
Foreword
Getting
Started
Chart Color Scheme
The Chart Color Scheme setting changes the day and night view of the Chart
Overlay colors on the Map page.
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Figure 9-28 Chart Color Scheme Settings
Selected Altitude Range Arc
NOTE: Requires a Garmin Display Unit (GDU). This feature is available
in software v6.60 and later.
Wpt Info
Map
Traffic
Enabling the Selected ALT Range Arc setting places a cyan arc in front of the
aircraft symbol. This arc represents the location at which the aircraft is expected
to reach the selected altitude.
Terrain
Weather
Selected ALT
Range Arc
Nearest
Services/
Music
Utilities
System
Messages
Figure 9-29 Selected ALT Range Arc
Restore Defaults
Returns values to the original factory settings.
Symbols
Appendix
Index
9-26
GTN 725/750 Pilot’s Guide
190-01007-03 Rev. R
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
Touch Icon For Info
ADS-B and TCAD
Status and Altitude
Filter
Direct-To
Proc
Map
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Touch For
Next Target
Traffic Motion
Vector
Ownship
Icon
Range Ring
Radius
Selected Vector
Motion and Duration
Traffic
Annunciation
Figure 10-19 Traffic Page for Ryan TCAD with GDL 88
Charts
Wpt Info
Selected
Traffic Info
Alerted Target,
1200 ft Above and
Climbing
FPL
10.6.2
Map
Orientation
Touch To View
Traffic Menu
Altitude Mode
The GDL 88 has four altitude display modes: Normal (±2,700 feet, Above
(-2,700 feet to +9,900 feet), Below (-9,900 feet to +2,700 feet), and Unrestricted
(±9,900 feet). The GDL 88 continues to track up to 30 intruder aircraft within its
maximum surveillance range, regardless of the altitude display mode selected.
The selected altitude display mode is displayed in the upper left-hand corner
of the Traffic page.
The Altitude Filter limits the traffic displayed to the Below,
Normal, Above or Unrestricted altitude block as listed in the
“Displayed Traffic Range” table. The filter altitudes are relative
to ownship altitude. While viewing the Traffic page, touch the
Altitude Filter key to change the altitude filter value. Select
the desired altitude filter by touching the BELOW, NORMAL,
ABOVE, or UNRESTRICTED keys. The selection is displayed
in the Altitude mode field.
Messages
Symbols
Appendix
Index
10-26
GTN 725/750 Pilot’s Guide
190-01007-03 Rev. R
12.1.1
Displaying SiriusXM Weather
Foreword
To display SiriusXM Weather information:
1. Touch the Weather key on the Home page and then touch
the SiriusXM key.
Weather
Product
Legends
Getting
Started
Audio &
Xpdr Ctrl
NEXRAD Weather
Com/Nav
Age Of Selected
Weather Products
FPL
Direct-To
Proc
Out Of Coverage Area
Selected Altitude
Touch + or - To
Select Altitude
Figure 12-4 SiriusXM Weather Page
2. While viewing the Data Link weather page, touch the
Menu key to configure the Data Link Weather page.
Touch NEXRAD
Key To Select
Off, Composite
(CONUS), or Base
Charts
Wpt Info
Map
Traffic
Terrain
Weather
Touch Keys To
Select Weather
Product. Green Bar
Indicates Selected
Product.
Nearest
Services/
Music
Utilities
Weather Overlay
Map Orientation
Touch Legend Key
To Display Legend
Figure 12-5 SiriusXM Weather Menu
System
Messages
3. Once you selected what items you want to display, touch BACK
to return to the Data Link Weather page.
Symbols
Appendix
190-01007-03 Rev. R
GTN 725/750 Pilot’s Guide
12-3
Index
NOTE: The unit displays valid times on the weather map in lieu of product
age indications for SiriusXM Weather Icing Potential, Winds Aloft, and
Turbulence weather products.
Foreword
Getting
Started
NOTE: The unit displays product age for SiriusXM Weather Freezing Level
and Canada Winds Aloft weather products. The product age indication
represents the number of minutes that have elapsed since the weather
product was provided by SiriusXM Weather. The unit does not display the
valid times assigned to the information within these products.
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
12.1.5
NEXRAD
WSR-88D, or NEXRAD (NEXt-generation RADar), is a network of
158 high-resolution Doppler radar systems that are operated by the National
Weather Service (NWS). NEXRAD data provides centralized meteorological
information for the continental United States and selected overseas locations.
The maximum range of a single NEXRAD radar site is 250 NM. The NEXRAD
network provides important information about severe weather for air traffic
safety.
NEXRAD data is not real-time. The lapsed time between collection,
processing, and dissemination of NEXRAD images can be significant and may
not reflect the current radar synopsis. Due to the inherent delays and the relative
age of the data, it should be used for long-range planning purposes only. Never
use NEXRAD data for maneuvering in, near, or around areas of hazardous
weather. Instead, use it in an early-warning capacity of pre-departure and en
route evaluation.
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 returns from the lowest antenna tilt angle.
NOTE: Due to similarities in color schemes, the display of Echo Tops cannot
be shown with Cloud Tops and NEXRAD.
System
Messages
Symbols
Appendix
Index
12-8
GTN 725/750 Pilot’s Guide
190-01007-03 Rev. R
1. While viewing the SiriusXM Weather menu, touch the
NEXRAD key to display the NEXRAD selections.
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Figure 12-9 SiriusXM NEXRAD Weather Selection
NOTE: Depending on the SXM service and installed GDL hardware, radar
base reflectivity imaging may have broader coverage within North America
or be limited to only Canada.
Proc
Charts
Wpt Info
2. Touch the desired NEXRAD source selection and then the
Back key to view the weather information.
Map
Traffic
NEXRAD Source
Age Of Selected
Weather Products
Terrain
NEXRAD Weather
Weather
Present Position
Nearest
Services/
Music
Utilities
System
Figure 12-10 SiriusXM NEXRAD Weather
Messages
Symbols
Appendix
190-01007-03 Rev. R
GTN 725/750 Pilot’s Guide
12-9
Index
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
12.1.18 Icing
The Icing product shows a graphic view of the current icing environment
in four categories: light, moderate, severe, and extreme (not specific to aircraft
type). The Icing product is not a forecast, but a presentation of the current
conditions at the time of the analysis. Supercooled Large Droplet (SLD) icing
conditions are characterized by the presence of relatively large, super cooled
water droplets indicative of freezing drizzle and freezing rain aloft. SLD threat
areas are depicted as black and red blocks over the Icing colors. Icing and SLD
data are shown between 1,000 feet and 30,000 feet in 3,000 foot increments.
1. While viewing the Data Link Weather menu, touch the
Icing key.
Direct-To
Proc
SLD Threat
Charts
Icing Potential Shading
Wpt Info
Present Position
Map
Traffic
Selected Icing Altitude
Terrain
Touch To Select
Icing Altitude
Weather
Figure 12-40 Icing and SLD
2. Touch the WX Aloft ALT – or + keys to increase or decrease
the reporting altitude of icing in 3,000 foot increments. The
selected altitude is shown in a window above the altitude keys.
3. Touch the Icing key again to turn it off.
Nearest
Services/
Music
Utilities
G3 SiriusXM
G4 SiriusXM
System
Messages
Symbols
Appendix
Index
Figure 12-41 Icing Legend
12-26
GTN 725/750 Pilot’s Guide
190-01007-03 Rev. R
12.4
GWX Radar Operation in Weather Mode
Foreword
WARNING: Begin transmitting only when it is safe to do so. When
transmitting while the aircraft is on the ground, no personnel or objects
should be within 11 feet of the antenna.
CAUTION: In Standby mode, the antenna is parked at the center line. It
is always a good idea to put the radar in Standby mode before taxiing the
aircraft to prevent the antenna from bouncing on the bottom stop and
possibly causing damage to the radar assembly.
When the weather radar system is in the Weather or Ground Map mode, the
system automatically switches to Standby mode on landing.
The GWX 68 synchronizes the controls from all connected displays. All other
GWX radars take commands from each display independently and perform a
separate sweep for each.
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
Map
Traffic
Tilt
Show Bearing
Terrain
Bearing
Turbulence Detection*
GCS*
ACT*
Watch Shading
Weather Alert
Stabilize
Mode
Weather
Standby
Weather
Ground
Test
Nearest
Scan
Horizontal
Services/
Music
Vertical
Sector Scan
20
40
60
90*
Utilities
Full
Gain
System
*GWX 70/75/80 only.
Messages
Figure 12-59 Weather Radar Functional Diagram
Symbols
Appendix
190-01007-03 Rev. R
GTN 725/750 Pilot’s Guide
12-45
Index
Foreword
12.4.1
Viewing Weather on the Weather Radar Page
1. From the Home page, touch Weather and then Radar
(if necessary).
Getting
Started
Audio &
Xpdr Ctrl
Antenna
Stabilization,
Ground
Suppression, and
WATCH Shading
Status Fields
Bearing
Line
Com/Nav
FPL
Direct-To
Proc
Charts
Range Scale
Scan Line
Bearing Line Display
Tilt
Adjustment
Altitude
Compensated Tilt
Status Field
Precipitation
Scale
Wpt Info
Operating
Mode
Map
Scan Direction
(Horizontal)
Traffic
Gain
Calibration
Setting
Bearing Line
Adjustment
Figure 12-60 Weather Radar Page (Horizontal Scan)
Terrain
2. Touch the MODE key and then touch the function desired.
Weather
3. The color-coded precipitation scale is shown on the left side
of the display. A table describing the precipitation intensity
levels is in section 12.3.5.1.
Nearest
Services/
Music
Utilities
Precipitation
Color Values
System
Messages
GWX 68/70
Symbols
Figure 12-61 Weather Radar Precipitation Scale
4. Touch the IN and OUT keys to select the desired range. Touch
the desired keys to set any required values as described below.
Appendix
Index
GWX 75/80
12-46
GTN 725/750 Pilot’s Guide
190-01007-03 Rev. R
12.4.2
Weather Radar Modes
Foreword
Selecting Ground, Weather, or Test mode initiates a warm-up period
(a countdown timer displays on the screen). The selected mode is available once
warm-up is complete.
1. While on the ground, touch MODE.
2. In the Weather Radar Mode window, touch STANDBY.
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Touch the Desired Mode
Direct-To
Proc
Charts
Wpt Info
Map
Figure 12-62 Weather Radar Mode Selection
3. Touch MODE and select Weather, Ground, or Test. A caution
window is displayed.
Traffic
Terrain
Weather
Nearest
Services/
Music
Figure 12-63 Caution for Radar Activation Confirmation
4. Touch OK to acknowledge the selected mode will be activated.
If Weather or Ground is selected, a warm-up period is initiated
(countdown is displayed on the screen). After the warm-up is
complete, the radar begins transmitting.
Utilities
System
Messages
Symbols
Appendix
190-01007-03 Rev. R
GTN 725/750 Pilot’s Guide
12-47
Index
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
NEXRAD
Off
CONUS
Regional
FPL
Combined
Cloud Tops
Icing
Turbulence
Wind/Temp Aloft
Direct-To
Proc
1,000 ft ... 45,000 ft
Charts
Lightning
METAR
PIREP
SIGMET
Center WX Advisory
G-AIRMET
Off
Wpt Info
Map
Traffic
Current (Auto)
All Forecasts
Terrain
G-AIRMET Filters
Orientation
Track Up
Heading Up
Weather
North Up
Datalink Status
Legend
Nearest
Services/
Music
Figure 12-94 FIS-B Weather Functional Diagram
WARNING: Do not use the indicated data link weather product age to
determine the age of the weather information shown by the data link
weather product. Due to time delays inherent in gathering and processing
weather data for data link transmission, the weather information shown by
the data link weather product may be significantly older than the indicated
weather product age.
Utilities
System
Messages
Symbols
Appendix
190-01007-03 Rev. R
GTN 725/750 Pilot’s Guide
12-73
Index
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
12.6.1
FIS-B Operation
Weather data reception time is shown in the upper right corner of the screen.
An indicated time shows if the aircraft is currently within reception coverage
of a ground station with weather broadcast capabilities. The ground system
determines the weather coverage area and extent of data that is transmitted by
each ground station.
Due to similarities in depiction, the following FIS-B Weather products are
mutually exclusive: NEXRAD, Cloud Tops, Icing, Turbulence, Winds and
Temperatures Aloft, and Lightning.
1. From the Home page, touch the Weather key on the Home
page and then touch the FIS-B Weather key (if necessary).
Direct-To
Proc
Charts
Wpt Info
Map
Age Of Selected
Weather Products
Weather
Product
Legends
Traffic
Terrain
Weather
NEXRAD
Selection
Touch + or - To
Select Map Range
Figure 12-95 FIS-B Weather Page (NEXRAD Key Shown)
Nearest
2. While viewing the FIS-B weather page, touch the Menu key
to configure the Data Link Weather page.
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
12-74
GTN 725/750 Pilot’s Guide
190-01007-03 Rev. R
Touch Keys To
Select Weather
Product. Green Bar
Indicates Selected
Product.
Weather Overlay
Map Orientation
Touch Legend Key
To Display Legend
Touch To View
Datalink Status
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Figure 12-96 FIS-B Weather Data Link Menu
3. Once you selected what items you want to display, touch BACK
to return to the FIS-B Weather page.
Direct-To
Proc
12.6.2
Charts
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.
Wpt Info
Map
Traffic
Terrain
Out Of CONUS
NEXRAD Coverage
Weather
Nearest
Services/
Music
CONUS NEXRAD
Coverage Shown
Utilities
System
CONUS Selected
On NEXRAD Key
Messages
Figure 12-97 FIS-B CONUS NEXRAD
Symbols
Appendix
190-01007-03 Rev. R
GTN 725/750 Pilot’s Guide
12-75
Index
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
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.
Out Of Regional
NEXRAD Coverage
Direct-To
Proc
Regional NEXRAD
Coverage Shown
Charts
Within Regional
NEXRAD Area But
Coverage Not Available
Wpt Info
Map
Regional Selected
On NEXRAD Key
Traffic
Figure 12-98 Regional NEXRAD
Terrain
Weather
Nearest
Services/
Music
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
12.6.2.1
Radar Data Animations
NOTE: Animated NEXRAD functionality is available in software v6.00 and
later.
Utilities
System
Symbols
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.
Appendix
Play and stop controls are active when three or more NEXRAD
images are available for playback.
Messages
Index
12-76
GTN 725/750 Pilot’s Guide
190-01007-03 Rev. R
12.6.2.2
CONUS and Regional NEXRAD
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.
Out Of CONUS
NEXRAD Coverage
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Regional NEXRAD
Boundary Shown
NEXRAD Weather Shown
Direct-To
Proc
Charts
CONUS & Regional
Selected On NEXRAD Key
Figure 12-99 FIS-B CONUS & Regional NEXRAD Combined
Map
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
Regional
Wpt Info
Combined
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
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Index
Foreword
Getting
Started
Type
Description
CONUS
• Large, low-resolution weather image for the entire continental
U.S.
Audio &
Xpdr Ctrl
Regional
Com/Nav
FPL
• 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
• Pixels are 1.5 min (1.5 nm = 2.78 km) wide by 1 min
(1 nm = 1.852 km) tall
Direct-To
• 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
Proc
Charts
• White hash mark indicates regional boundary
Wpt Info
• Animation functionality not available
Table 12-31 FIS-B NEXRAD Types
Map
Traffic
Terrain
Weather
12.6.2.3
NEXRAD Abnormalities
There are possible abnormalities regarding displayed NEXRAD images. Some,
but not all, causes of abnormal displayed information include:
• Ground Clutter
Nearest
• Strobes and spurious radar data
Services/
Music
• Sun strobes, when the radar antenna points directly at the sun
Utilities
• Military aircraft deploy metallic dust which can cause alterations in radar
scans
System
• Interference from buildings or mountains, which may cause shadows
Messages
• Scheduled maintenance may put a radar off-line
Symbols
Appendix
Index
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Affected Areas
Any area in the continental United States (CONUS) or Alaska where the
distance from ADS-B ground stations, or the combined effect of distance and
low altitude, is sufficiently great may cause poor reception. To find the latest
ground station coverage, visit www.faa.gov.
Reception will improve in some affected areas as the FAA completes the
NextGen ADS-B ground station infrastructure. However, due to line-of-sight
broadcast characteristics, operators with properly installed and functioning
equipment may still receive incomplete FIS-B data when signal reception is
limited by the distance from ground stations combined with a low altitude.
The example below displays an area where FIS-B data is degraded due to
poor reception:
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
No Coverage
Map
Traffic
Terrain
Weather
Nearest
No Coverage
Services/
Music
Figure 12-100 FIS-B Reception Unavailable
NOTE: No coverage areas are semi-transparent in software v6.60
and later.
Utilities
System
Messages
Symbols
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Index
Foreword
Selecting NEXRAD in the FIS-B Weather Menu
1. While viewing the FIS-B weather page, touch the Menu key
to select the NEXRAD choice.
Getting
Started
2. Touch the NEXRAD key to select Off, Regional, CONUS, or
Combined.
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Touch the Desired
NEXRAD Source
Proc
Charts
Wpt Info
Map
Figure 12-101 NEXRAD Source Selection
3. Touch the Back key to return to the FIS-B Weather Menu.
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
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GTN 725/750 Pilot’s Guide
190-01007-03 Rev. R
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
12.6.4
Cloud Tops
Cloud tops indicate the altitude of the highest visible portions of a cloud at
the time of measurement.
FIS-B cloud top data is generated by a computer model and has limited
accuracy compared to actual conditions.
Due to similarities in color schemes, this product is mutually exclusive with
Echo Tops.
FPL
Direct-To
Proc
Charts
Wpt Info
Map
Traffic
Figure 12-104 FIS-B Cloud Tops
1. While viewing the FIS-B Weather menu, touch the
Cloud Tops key.
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
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12.6.5
Lightning
Foreword
FIS-B lightning strikes display as a lightning bolt.
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Figure 12-105 FIS-B Lightning
1. While viewing the FIS-B Weather menu, touch the
Lightning key.
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
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Index
12.6.7
FIS-B SIGMETs and Textual AIRMETs
Foreword
SIGMETs (SIGnificant METerological Information) and AIRMETs (AIRmen’s
METerological Information) are broadcast for potentially hazardous weather
considered of importance to aircraft. The update rate is approximately every
20 minutes.
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
Figure 12-107 FIS-B SIGMET/AIRMET Legend
1. While viewing the FIS-B Weather menu, touch the
SIGMET/AIRMET key.
Map
Traffic
Terrain
Surface Winds
Weather
Present Position
Nearest
IFR Line
Turbulence Line
Services/
Music
Utilities
Mountain Obscured
System
Messages
Figure 12-108 FIS-B SIGMETs and AIRMETs
Symbols
Appendix
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GTN 725/750 Pilot’s Guide
12-85
Index
2. Touch a SIGMET/AIRMET line to view details. Touch the
Back key to return to the Weather display.
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Figure 12-109 SIGMET and AIRMET Details
3. Touch the SIGMET/AIRMET key again to turn it off.
Wpt Info
Map
Traffic
Terrain
12.6.8
Graphical AIRMETs
Graphical AIRMETs (G-AIRMETs) display more weather phenomena than
textual AIRMETs, while eliminating the need to interpret raw text. Updates
occur four times daily. Filtering options allow you to mitigate page clutter.
Weather
Forecast Settings
Nearest
Current (Auto): Displays active graphical records based on the current
UTC. The function automatically switches from 0 hr to 3 hr forecasts.
Services/
Music
All Forecasts: Displays the most recent, non-expired graphical records.
Utilities
Off: Turns the G-AIRMETs product off.
Forecast Periods are 0 hr, 3 hr, and 6 hr.
System
Messages
Symbols
Figure 12-110 FIS-B G-AIRMET Forecast Settings
Appendix
Index
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Filter Settings
Filters include: Freezing Level, Icing, IFR, Low-level Wind Shear, Mountain
Obscuration, Surface Winds, and Turbulence.
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Figure 12-111 FIS-B G-AIRMET Filters
Viewing Graphical AIRMETs
Direct-To
1. While viewing the FIS-B Weather menu, touch the
G-AIRMET key.
Proc
Charts
Wpt Info
Map
Traffic
Terrain
Weather
Figure 12-112 FIS-B G-AIRMETs
Nearest
2. Select between Current (Auto), All Forecasts, or Off.
Services/
Music
3. Select one or more filters.
Utilities
System
Messages
Symbols
Appendix
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Index
4. Touch a G-AIRMET line to view details. Touch the
Back key to return to the Weather display.
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
Map
Figure 12-113 G-AIRMET Details
12.6.9
Center Weather Advisory
These advisories communicate en route and terminal weather conditions
expected to occur within the next two hours.
Information is valid for up to 2 hours.
Traffic
Terrain
Weather
Nearest
Services/
Music
Figure 12-114 FIS-B Center Weather Advisory
Utilities
1. While viewing the FIS-B Weather menu, touch the
Center WX Advisory key.
System
Messages
4. To u c h a C WA l i n e t o v i e w d e t a i l s. To u c h t h e
Back key to return to the Weather display.
Symbols
Appendix
Index
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12.6.10 FIS-B Winds and Temperatures Aloft
Foreword
Winds and Temperatures Aloft data shows the forecast wind speed, direction,
and Temperature at selected altitudes. Altitudes can be selected in increments
from 1,000 feet up to 53,000 feet. The update rate is every 12 hours.
1. While viewing the Data Link Weather menu, touch the
Wind/Temp Aloft key.
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Wind Symbols
Charts
Wpt Info
Selected Wind Altitude
Map
Touch To Select
Wind Altitude
Traffic
Figure 12-115 Winds Aloft
2. Touch the WX Aloft ALT – or + keys to increase or decrease
the reporting altitude of the winds aloft in increments. The
selected altitude is shown in a window above the altitude keys.
3. Touch the Wind/Temp Aloft key again to turn it off.
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Figure 12-116 FIS-B Winds Aloft Legend
Symbols
Appendix
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GTN 725/750 Pilot’s Guide
12-89
Index
Foreword
12.6.11 Icing
NOTE: Due to the incremental and overlapping nature of the FIS broadcast,
timestamps, regional coverage, and map data availability may vary with
altitude for computer generated icing forecasts.
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
Icing potential is not a forecast, but a presentation of icing potential at the
time of analysis. For FIS-B, the icing timestamp shows the valid time in UTC.
Supercooled Large Droplet (SLD) icing conditions are characterized by the
presence of relatively large, super cooled water droplets indicative of freezing
drizzle and freezing rain aloft. SLD threat areas are depicted as black and pink
blocks over the icing colors.
The icing potential shows a graphic view of the current icing conditions.
Categories vary depending on the configured weather source. For FIS-B, they
include: Trace, Light, Moderate, and Heavy.
Altitude Range: 2,000 to 24,000 ft.
Map
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
Figure 12-117 FIS-B Icing
System
1. While viewing the FIS-B Weather menu, touch the
Icing key.
Messages
Symbols
Appendix
Index
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190-01007-03 Rev. R
12.6.12 Turbulence
Foreword
NOTE: Due to the incremental and overlapping nature of the FIS broadcast,
timestamps, regional coverage, and map data availability may vary with
altitude for FIS-B turbulence forecasts.
Turbulence is classified as light, moderate, severe, or extreme. Turbulence
data is intended to supplement AIRMETs and SIGMETs.
For FIS-B, the turbulence timestamp shows the valid time in UTC.
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Altitude Range: 2,000 to 24,000 ft (at 2,000 ft intervals).
Direct-To
Proc
Charts
Wpt Info
Map
Traffic
Terrain
Figure 12-118 FIS-B Turbulence
1. While viewing the FIS-B Weather menu, touch the
Turbulence key.
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
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Index
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
12.6.13 FIS-B PIREPs
Pilot Weather Reports (PIREPs) provide timely weather information. When
significant weather conditions are reported or forecast, Air Traffic Control (ATC)
facilities are required to solicit PIREPs. A PIREP may contain non-forecast
adverse weather conditions, such as low in-flight visibility, icing conditions,
wind shear, and turbulence. PIREPs are issued as either Routine (UA) or Urgent
(UUA). The update rate is approximately every 20 minutes.
1. While viewing the FIS-B weather page, touch the Menu key
to select the PIREP choice.
2. Touch the PIREP key to toggle PIREPs on or off.
Proc
Urgent PIREP
Symbol (Yellow).
Touch For Details.
Charts
Wpt Info
Map
Traffic
Routine PIREP
Symbol (Blue).
Touch For Details.
Terrain
Figure 12-119 Weather Display With PIREP Information Active
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
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3. Touch a weather information symbol to view details for that
item.
Foreword
Getting
Started
Audio &
Xpdr Ctrl
PIREP Details
Com/Nav
FPL
Selected PIREP
For Detail
Direct-To
Proc
Charts
Figure 12-120 PIREP Information Detail
4. Touch the Back key to remove the detailed information.
Wpt Info
Map
5. Touch the PIREP key again to turn it off.
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
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12-93
Index
16.4.6.3
GTN-G3X Touch Crossfilling
Foreword
NOTE: Requires pilot activation on both the GTN and the G3X Touch.
This feature is available in software v6.60 and later.
When this function is enabled by the pilot, active flight plan navigation is
crossfilled with the G3X Touch. It is recommended that all flight plan edits be
made using the G3X Touch when this function is active.
1. W h i l e v i e w i n g t h e S y s t e m S e t u p p a g e, t o u c h
External FPL XFILL to toggle between Enabled and Disabled
Crossfill with the G3X Touch.
2. Ensure that the crossfilling function on G3X Touch is active.
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
190-01007-03 Rev. R
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16-27
Index
Message
FLIGHT PLAN
IMPORT - New
imported flight
plan(s) available
for preview.
FLIGHT PLAN
IMPORT Changes to the
active route are
disabled.
FLIGHT PLAN
IMPORT - GDU
disconnected.
External flight
plan crossfill
inoperative.
FPL WAYPOINT
LOCKED Stored flight plan
waypoint is not in
current navigation
database.
FPL WPT MOVED Stored flight plan
waypoint has
changed location.
Description
Action
Foreword
The GTN has received a No action is necessary; message is
new flight plan that is informational only.
available for preview by
the pilot.
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 Xfill.
Communication with
the G3X Touch is lost.
Verify that the GDU is on.
Contact dealer for service.
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
A stored flight plan
waypoint is no longer in
the current navigation
database.
Verify stored cataloged flight plans
and procedures. Modify stored
flight plans as necessary to include
waypoints that are in the current
navigation database.
Map
Traffic
Terrain
Weather
A stored flight plan
waypoint has moved
by more than 0.33 arc
minutes from where
previously positioned.
The glideslope board
GLIDESLOPE Glideslope receiver is not communicating
property with the
has failed.
system.
Verify stored cataloged flight plans
and procedures. Modify stored
flight plans as necessary to include
waypoints that are in the current
navigation database.
Fly an approach that does not use
the glideslope receiver (VOR, LOC,
GPS). Contact dealer for service.
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
190-01007-03 Rev. R
GTN 725/750 Pilot’s Guide
17-11
Index
© 2019 Garmin Corporation
flyGarmin.com
April 2019
190-01007-1A Rev. A
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