Owner`s manual | Garmin GPSMAP 175 GPS Receiver User Manual

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Page 1
OWNER’S MANUAL AND REFERENCE
ZOOM
1
PAGE
GOTO
QUIT
MOB
MENU
MARK
EDIT
ENTER
TM
GPSMAP 175
®
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Software Version 2.0 or above
Internal Database Version 2.01 © Navionics Corporation
G-chart cartridge data is copyrighted by Navionics Corporation and may not be
copied or used for any other purpose without permission.
© 1996 GARMIN Corporation
1200 E. 151st Street, Olathe, KS 66062, USA
GARMIN (Europe) LTD
Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9AQ UK
All rights reserved. No part of this manual may be reproduced or transmitted
in any form or by any means, electronic or manual, including photocopying and
recording, for any purpose without the express written permission of GARMIN.
GARMIN, GPSMAP, G-chart, AutoLocate, TracBack, and PhaseTrac12 are
registered trademarks of GARMIN Corporation and may only be used with
permission. All rights are reserved.
Information in this document is subject to change without notice. GARMIN
reserves the right to change or improve its products and to make changes in the
content without obligation to notify any person or organization of such changes
or improvements.
September 1996
Part #190-00096-00 Rev. A
Printed in Taiwan.
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Page i
INTRODUCTION
Capabilities/Packing List
1
Before installing and getting started with your unit, please check to see that
your package includes the following items. If any parts are missing, please see
your GARMIN dealer immediately.
Standard Package:
• GPSMAP 175 Unit
• Owner’s Manual
• Quick Reference Card
Optional Accessories:
• G-Chart Electronic Chart Cartridges
• External Antenna and 30’ Cable
• Power/Data Cable
• Mounting Bracket
• PCmate PC-Kit
Congratulations on choosing one of the most advanced marine navigation
systems available! The GARMIN GPSMAP 175 uses the proven performance
and simple operation of GARMIN GPS in combination with powerful G-Chart
electronic charting for detailed cartography and plotting that will help guide
you in waterways around the world:
Precision Performance
• High-contrast LCD screen
• PhaseTrac12 receiver tracks and uses up to 12 satellites simultaneously for
fast, accurate positioning
• Differential-Ready— just add the optional GBR 21 beacon receiver for better
than 10 meter accuracy
• Fully-gasketed, dry nitrogen-filled case for use in exposed locations
Advanced Navigating and Plotting
• 250 alphanumeric waypoints with selectable icons and comments
• Built-in worldwide database usable from 4096 to 64 nm scales
• 20 reversible routes with up to 30 waypoints each
• G-chart electronic charting with inland and offshore coverage
• On-screen point-to-point distance and bearing calculations
• TracBack route feature which allows you to quickly retrace your track log to
a starting position
• Built-in simulator mode
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Page ii
INTRODUCTION
Warning and Caution
WARNING!
The electronic chart is an aid to navigation and is designed to facilitate the use of
authorized government charts, not replace them. Only official government charts and
notices to mariners contain all information needed for the safety of navigation–and,
as always, the user is responsible for their prudent use.
CAUTION
The GPS system is operated by the United States government, which is solely
responsible for its accuracy and maintenance. The system is subject to changes
which could affect the accuracy and performance of all GPS equipment. Although
the GARMIN GPSMAP 175 is a precision electronic NAVigation AID (NAVAID),
any NAVAID can be misused or misinterpreted and, therefore, become unsafe.
Use the GPSMAP 175 at your own risk. To reduce the risk of unsafe operation,
carefully review and understand all aspects of this Owner’s Manual—and
thoroughly practice operation using the simulator mode prior to actual use. When
in actual use, carefully compare indications from the GPSMAP 175 to all available
navigation sources, including the information from other NAVAIDs, visual
sightings, charts, etc. For safety, always resolve any discrepancies before
continuing navigation.
NOTE: This equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee
that interference will not occur in a particular installation. If this equipment does
cause harmful interference, the user is encouraged to try to correct the interference
by relocating the equipment or connecting the equipment to a different circuit.
Consult an authorized dealer or other qualified technician for additional help if
these remedies do not correct the problem.
This device complies with part 15 of the FCC limits for class B digital devices.
Operation is subject to the following 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.
The GPSMAP 175 contains no user-serviceable parts. Repairs should only be
made by an authorized service center. Unauthorized repairs or modifications
could void your warranty and your authority to operate this device under Part 15
regulations.
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Page 1
GETTING STARTED
Table of Contents
1
Capabilities/Packing List .................................................................i
Warning and Caution......................................................................ii
Table of Contents/Appendices .....................................................1-2
Unit Features...................................................................................3
Keypad Usage ..................................................................................4
Initializing the Receiver/Getting Started ...................................5-22
Section 1: GPSMAP Status Page..............................................23-25
Satellite status page description, receiver status, and initialization options
Section 2: Position Page ..........................................................26-27
Position page description and uses
Section 3: Map Page.................................................................28-35
Map page description, modes, scales, and options
Section 4: Navigation Page ......................................................36-38
Navigation page description and options
Section 5: Main Menu Page...........................................................39
Viewing the main menu page and selecting submenus
Section 6: Waypoints ...............................................................40-48
Creating, using, and editing waypoints
Section 7: GOTO/MOB/TracBack Functions...........................49-52
Going to a destination and using GOTO options/TracBack routes
Section 8: Routes .....................................................................53-60
Creating, editing, and using routes
Section 9: Setup Menus...........................................................61-70
System and navigation setup; timers, alarms, and track log
Section 10: Using G-chart cartridges ......................................71-72
Inserting, removing, and using electronic chart cartridges
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GETTING STARTED
Appendices
APPENDICES
Appendix A:
GPSMAP 175 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .73-75
Appendix B:
Wiring & Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76-79
Appendix C:
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80-81
Appendix D:
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Appendix E:
Time Offsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Appendix F:
Map Datums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84-88
Appendix G:
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89-91
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Page 3
1
GETTING STARTED
GPSMAP 175 Unit Features
Internal GPS
Antenna
ZOOM
Operating
Keypad
PAGE
GOTO
QUIT
MOB
MENU
MARK
EDIT
ENTER
Battery Pack
(in back)
Three-level gray
LCD display
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INTRODUCTION
2
Keypad Usage
P
J
Turns the unit on and off and controls 3-level
screen backlighting.
M
Captures your present position and displays
the mark position window.
G
Displays the GOTO waypoint window,
allowing you to select the destination
waypoint. Press GOTO twice to select a
destination waypoint graphically from the map.
O
Displays a context-sensitive options window.
Press MENU twice to display main menu page.
T
Activates highlighted fields and confirms menu
options and data entry.
Q
Returns display to a previous page or restores a
data field’s previous value.
Z
R
B
Scrolls the main pages in sequence and returns
display from a submenu page to a main page.
Adjusts the map and highway scales up
and down.
Controls the movement of the cursor and is
used to select options and positions, and to
enter data.
Marks your present GPS position and instantly
sets a return course while providing steering
guidance.
The GPSMAP 175’s advanced keypad system is designed to allow for fast, convenient
selection of navigation options and data entry.
The Getting Started Tour will introduce you to most of the keypad and provide a
“hands-on” lesson in using the GPSMAP 175. We strongly encourage you to take the
Getting Started tour before using your unit for actual navigation.
The GPSMAP 175 Quick Reference Card contains helpful tips on using the unit and
performing various navigation tasks. It’s a good idea to keep the Quick Reference Card
nearby whenever you’re navigating with your new GPS chartplotter.
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Page 5
GETTING STARTED
Acquiring Satellite Signals
1
Acquiring Satellite Signals
Because the GPSMAP 175 relies on satellite signals to provide you with
navigation guidance, the receiver needs to have an unobstructed, clear view
of the sky for best performance. What exactly does this mean? In a nutshell,
the GPS receiver’s view of the sky will generally determine how fast you get
a position fix, or if you get a fix at all. GPS signals are relatively weak, and
do not travel through large obstructions made of metal, rock, or wood, for
example.
Once the GPS has calculated a position fix, you’ll usually have anywhere
from four to twelve satellites in view. Your GPSMAP 175 will now
continuously select the best satellites in view to update your position. If
some of the satellites in view get blocked or “shaded,” the receiver can
simply use an alternate satellite to maintain the position fix. Although a GPS
receiver needs four satellites to provide a 3D fix (latitude, longitude and
altitude), the GPSMAP 175 can maintain a 2D fix (latitude and longitude
only) with just three satellites.
Before You Initialize
Take your GPSMAP175 outside and find a large, open area (try a nearby
park) that has a clear view of the sky from horizon to horizon. Hold the
receiver at a comfortable height, at arm’s length from your body with the
built-in antenna (the top part above the display) parallel to the ground.
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Page 6
INTRODUCTION
Initialization
Initializing Your GPSMAP 175 for First-Time Use
Your GPSMAP 175 calculates your position and movement by tracking
signals sent from GPS satellites. Each of the 24 GPS satellites circle the earth
twice a day in a very precise orbit, and transmit information back to earth.
In order to determine a position fix, your GPS receiver needs to
continuously “see” at least three satellites.
Because a GPS receiver can only see satellites above the horizon, it needs
to know what satellites to look for at any given time. By using an almanac
(a timetable of satellite numbers and their orbits) stored in the receiver’s
memory, the GPSMAP 175 can determine the distance and position of any
GPS satellite.
To use this almanac data, your GPSMAP 175 needs to know where you
are, or be given the opportunity to “find itself.” Once you initialize the unit
to this position, the GPSMAP 175 will usually compute a fix within a few
minutes.
Remember, this process is only necessary under the following conditions:
• First-time use from the factory;
• The receiver has been moved over 500 miles from the last calculated
position with power off; or
• The receiver’s memory has been cleared and all stored data has been lost.
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GETTING STARTED
Initialization
1
The first time you power up your new GPSMAP 175 is an important step
in getting the best possible GPS performance. The receiver must be given an
opportunity to collect satellite data and establish its present position. To
ensure proper initialization, the GPSMAP 175 is shipped from the factory in
AutoLocate mode, which will allow the receiver to ‘find itself’ anywhere in the
world. To speed up the initialization process, we recommend using the
graphic initialization process described below, which will usually provide a
position fix in about a minute.
Before you initialize, make sure the GPSMAP 175 unit and antenna have
been correctly installed on your vessel according to the instructions in
Appendix A and B.
To turn the GPSMAP 175 on:
1. Press and hold the P key until the power tone sounds.
The welcome page will appear while the unit conducts a self test. Once the
internal test is complete, the mariner’s warning will appear, asking you to read
and acknowledge important information regarding the proper use of
electronic charts.
To acknowledge the mariner’s warning:
1. Press the T key.
A message alert and prompt will also appear to ask you to select an
initialization method.
To view a system message:
1. Press the J key.
2. Press the J key again to return to the previous page.
A. The welcome page
will be displayed
while the unit
performs a self-test.
B. Confirm the
Mariner’s Warning
before starting
navigation.
Remember that the
electronic chart is
designed as a
supplement to local government charts, not as a replacement.
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GETTING
STARTED
Initialization
The select initialization window will appear, with the ‘select from map’
option highlighted.
1. Press T to initialize the receiver from the built-in worldwide map.
The map page will appear, prompting you to select your approximate
present position with the map cursor.
1. Use the R keypad to move the map cursor to a location close to your present
position. If you have difficulty identifying your exact position, use the bottom
arrow of the Z key to zoom in to a lower map scale.
2. Press T to confirm your selection.
The GPSMAP 175 will now begin searching for the appropriate satellites
for your present position and should acquire a fix within a minute or so.
While the receiver searches for satellites, a flashing satellite icon will appear at
the left-hand side of the status bar. A signal strength bar will also appear for
each satellite in view, with the appropriate satellite number under each bar.
The progress of satellite acquisition is shown in three stages:
• No signal strength bars— the receiver is looking for the satellites
indicated.
• Hollow signal strength bars— the receiver has found the indicated
satellite(s) and is collecting data.
• Solid signal strength bars— the receiver has collected the necessary
data and the satellite(s) is ready for use.
Once the receiver has collected information from at least three satellites, the
flashing satellite icon on the status bar will glow steadily, and the GPSMAP
175 is ready for use.
A. Use the arrow
keypad to move the
cursor to a location
close to your
present position.
B. Hollow signal
strength bars will
appear on the
status page while
the receiver collects
satellite data.
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GETTING STARTED
Power On/Screen Contrast
The GARMIN GPSMAP 175 is a powerful electronic
charting/navigating system that provides detailed chart coverage and
convenient control of many advanced features right from the map display.
This tour is designed to take you through the basic pages and functions
of the system using the simulator mode. Once you’re familiar with the
main pages and functions of the unit, refer to the reference section for
instructions on performing specific tasks and functions.
The Getting Started tour assumes that the receiver has been properly
installed and initialized, and you have not changed any of the default unit
settings. If you have changed any settings (position formats, units of measure,
etc.), the descriptions and pictures in the tour may not match your configuration.
To turn the GPSMAP 175 on:
1. Press and hold the P key until the power tone sounds. The welcome page
will appear while the unit conducts a self test.
2. Once the self test is complete, press the T key to acknowledge the
mariner’s warning.
The satellite status page will appear, and the receiver will begin to acquire
satellites. From the status page, you may also quickly adjust the screen
contrast and backlighting.
To adjust the screen contrast:
1. Increase the screen contrast by pressing the right arrow of the R keypad.
2. Decrease the screen contrast by pressing the left arrow of the R keypad.
3. Press the T key to finish.
The GPSMAP 175’s three-level screen backlighting is controlled with the
P key, and may be adjusted at any time from any page.
To turn on and adjust the backlighting:
1. Press the P key repeatedly until backlighting is at the desired level
(off, 1, 2, or 3).
A. The screen contrast
may be adjusted
from the
status page by
pressing the
ARROW KEYPAD.
Press EDIT/ENTER
to confirm changes.
B. Whenever the screen
backlighting is on, a
bulb icon will appear in the status bar at the bottom of every GPSMAP 175 page.
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GETTING STARTED
Status Page/Simulator Mode
Status Field
Horizontal Accuracy
Satellite
Sky View
Dilution of Precision
Signal Strength
Indicators
Status Bar
The GPSMAP 175’s status page provides a visual reference of satellite
acquisition and receiver status, with a signal strength bar graph and a satellite
sky view in the center of the page. Each page of the GPSMAP 175’s system also
features an options page, which gives you access to other functions and
features that relate to the specific page you are viewing. To get a feel for how
the options pages work, lets put the GPSMAP 175 into simulator mode.
To place the GPSMAP 175 in simulator mode:
1. From the status page, press the O key. The options page will appear,
displaying a menu of options and functions for the status page.
2. Use the UP or DOWN arrow of the R keypad to highlight the ‘Start
Simulator?’ option and press T.
3. Press the T key to confirm the simulator warning.
Once the simulator has been started, the status field at the top of the page
will display a ‘Simulating Navigation’ status, and you’re ready to continue the
rest of the tour. Keep in mind that the GPSMAP 175 does not track satellites
in simulator mode, and should never be used for actual navigation. However,
all the waypoint and route planning done in simulator mode is retained in
memory and can be used during normal operation.
A. To start the simulator, confirm the simulator
warning. Simulator mode should never be used for
actual navigation.
B. Whenever Simulator
mode is activated, a
‘Setup Simulator?’ and
an ‘Exit Simulator?’
option will appear on
the options page.
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GETTING STARTED
1
Page Sequence/Position Page
The satellite status page is one of four main pages used in the GPSMAP 175’s
system. All four pages are linked together in a simple chain, which allows you
to scroll through the pages in either direction using the J and Q keys. To
continue the tour, let’s move on to the next page, the position page.
To scroll to the next page in sequence:
1. Press the J key.
Compass
Tape
Data
Fields
Position
Coordinates
Time
of Day
Status Bar
The GPSMAP 175’s position page shows where you are, what direction
you’re heading and how fast you’re going. The compass at the top of the page
indicates your cardinal heading while you’re moving. The four user-selectable
data fields below the compass tape show your current course and speed over
ground, along with a resettable trip odometer and altitude display. Your
current latitude and longitude, along with a 12/24-hour clock, appear at the
bottom of the page.
Now that you’ve seen how the status and position pages can be used to
monitor satellite acquisition and your present position, let’s take a minute to
learn how to mark and store our present position as a waypoint. (Since we’re
in simulator mode, the present position displayed will be the last position
calculated by the receiver, which should be the spot where you’ve initialized
the unit.) This will also give you an opportunity to see how the GPSMAP 175’s
R keypad and T key are used for data entry.
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GETTING STARTED
Marking A Position
1. Press the M key. The mark position page will appear, with a default
three-digit waypoint name and symbol.
2. Use the R keypad to highlight the waypoint name field (001) and press T.
3. Press the LEFT ARROW of the R keypad to clear the name field.
4. Use the R keypad to enter the name ‘DOCK’, using the UP and DOWN
arrows to select each letter, and the RIGHT arrow key to advance to the
next character position. If you make a mistake and select an incorrect
character, simply use the LEFT arrow key of the R keypad to backspace
the cursor and correct the entry.
5. Press T to confirm the name.
6. The field highlight will advance to the symbol field. Press T to access
the waypoint symbol page.
7. Use the R keypad to highlight the ANCHOR symbol.
8. Press T to confirm the symbol.
9. Press T again to confirm the ‘DONE?’ prompt and save the waypoint.
The waypoint is now stored in memory. Note that waypoints may also be
created graphically from the map display and by manually entering position
coordinates. Both of these techniques are described in the reference section of
the manual and/or on your GPSMAP 175 Quick Reference Guide. To continue
our tour, let’s move on to the map page.
1. Press the J key.
A. The mark position
page will
automatically assign
a default three-digit
name for each
waypoint, which can
be changed to a sixcharacter
alphanumeric name
at any time.
12
B. A complete set of waypoint symbols allows you to mark inland and offshore waypoints
with a custom icon for fast waypoint recognition.
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GETTING STARTED
1
Map Page
The GPSMAP 175’s map page combines digital chartplotting with a userselectable display of navigation data and a built-in worldwide database to 64
nautical miles (nm). It will also be the page you use most to create and edit
waypoints and routes. Before we take off on our practice route, let’s take a brief
look at its various features and displays.
Data
Fields
Boat
Icon
Map
Scale
The map display, located in the middle of the page, shows your boat as a
triangle marker on an electronically generated chart, along with geographic
names, markers and buoys that are provided by the G-chart cartridge you’re
currently using. It also displays your track, routes and nearby waypoints. An
on-screen cursor lets you “pan” or move the view on the screen to see other
areas, determine the range and bearing to a position, and perform various
waypoint and route functions.
The data window, located at the top of the page, provides a userselectable display of various navigation data, including course, speed over
ground, and the bearing and distance to the cursor or a particular waypoint.
The status bar, located at the bottom of the page, displays the current map
scale setting, as well as the status information described on page 23.
A. Select an on-screen
waypoint by moving
the cursor onto the
waypoint. The name
and position, along
with the bearing and
distance from your
present position, will
be displayed.
B. The map page can
also be configured to display additional data fields and a graphic course deviation
scale or compass. See page 32 for more on map options.
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GETTING STARTED
2
Using the Map Cursor
Working from the map page is a simple process that centers around the use
of the cursor. Controlled by the R keypad, the cursor is an important tool that
can be used to pan to other map locations, mark and edit waypoints and
routes, and review position data of on-screen navaids and waypoints.
To get a feel for using the map page and using the cursor, try the
following exercise:
1. Use the DOWN arrow of the Z key to set the map scale to the 64 nm setting.
Your boat should be in the center of the map, at the receiver’s last known
position. (If your boat isn’t where it should be, make sure that you have
initialized the receiver and acquired a position as described on pages 6-8.
2. Use the DOWN arrow of the R keypad to move the cursor down to the
first lat/lon grid south of your boat’s position.
3. Using the R keypad to move the cursor, try following the outline of the
lat/lon grid closest to your boat. Notice how another data field appears at
the top of the page, showing the bearing and distance from your boat to
the cursor, along with the lat/lon of the cursor.
4. Press the Q key to remove the cursor and recenter your boat on the map display.
As you become more familiar with the cursor, you’ll see that the map
display actively scrolls or ‘pans’, letting you explore areas around the world
(even outside of your current G-chart coverage) and create waypoints and
routes. Wherever you move the cursor, you’ll always be just one Q
keystroke away from returning the map to your present position.
Now that you have a feel for how the cursor works, let’s move on and see
how the GPSMAP 175 works on the water. To help you practice using the
map page and other features, we’ve stored a practice route in the receiver’s
permanent memory, so you can see exactly what you’ll experience when
you’re navigating with your new GPS chartplotter.
A. Whenever the
cursor is active, the
bearing and
distance of the
cursor from your
present position will
appear in a pop-up
data window.
B. To remove the
cursor and recenter
your vessel on the map, press the QUIT key.
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Page 15
GETTING STARTED
Using the GOTO Key
1
GPS is all about marking positions as waypoints and navigating to them
using the receiver’s steering guidance and map displays. We’ve already seen
how to use the M key to store our present position, so it’s time to move on
to the fun part: going to a destination. The G key, located on the left side of
the keypad above the Q key, is the primary tool used to select a destination
waypoint or a route to navigate. The G key can be used in three ways:
• Pressing G once displays a list of all waypoints in memory, from which
you can select a single destination waypoint.
• Pressing G followed by the O key provides a list of GOTO options
that lets you start a TracBack route, select a destination waypoint from the
nearest waypoints list, select a stored route to navigate, or cancel the
current GOTO destination.
• Pressing G twice allows you to graphically select an on-screen
waypoint, navaid or cursor position as a destination directly from the
map display.
For our simulated trip, we’re going to select the preprogrammed tour route
(the second method), which will automatically place our vessel at the first route
waypoint. This will also give us an idea of how the O key is used throughout
the GPSMAP 175 system to provide options automatically oriented toward the
function currently in use. Let’s give it a try by activating the practice route stored
in memory for navigation:
1. Press G. The waypoint list page will appear. (If we were selecting a
single waypoint to navigate to rather than a route, we would highlight the
waypoint and press T.
2. Press Oto display the context-sensitive options available for the GOTO function.
3. Use the R keypad to highlight the ‘Select Route?’ option. Press T to confirm.
4. The select route page will appear, with the ‘GPSMAP TOUR’ route highlighted.
5. Press T. The map page will reappear and display five waypoints chained
together in a simple route, with your boat at the first route waypoint.
A. Pressing GOTO
once displays a list
of all waypoints
stored in memory.
To pick a
destination, select
the desired
waypoint and press
EDIT/ENTER.
B. The GOTO options
page allows you to either start a TracBack route back home, select a destination
from the nearest waypoints list, or select a route to navigate.
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GETTING STARTED
Simulator Setup/Map Scales
A data field at the top of the page will now display the bearing and distance
to the second route waypoint. To continue, let’s enter a speed for our vessel,
which we can do from the ‘Setup Simulator?’ listing on the options page. The
setup simulator page is also available from any other page in the main page
sequence.
To enter a boat speed:
1. Press the O key to display the map options page.
2. Use the R keypad to select the ‘Setup Simulator?’ option, and press T.
3. Once the setup simulator page appears, press T to access the SOG field
(Speed Over Ground).
4. Use the R keypad to enter a speed of 60 knots.
5. Press T to finish, and J to return to the map display.
Once a speed has been entered, you’ll notice that the map will begin to move
slowly, keeping your boat centered on the display. To get a better view of what’s
going on, zoom in to a closer map scale.
1. Press the DOWN arrow of the R key to select the 16 nm scale.
You’ll now have a clearer picture of the route we are navigating, along with an
outline-only presentation of the surrounding shoreline. Because the usable range
of the built-in database is only valid to 64 nm scale, we no longer have full
cartography available. Keep in mind that whenever you do exceed the usable
range of the built-in database or the G-chart cartridge in use, the range field will
display ‘OVR ZM’ or ‘NO MAP’ to indicate that you should exercise extreme
caution using the cartography data. (See pages 31 and 72 for more information
on map scales and using G-chart detailed cartography.)
Now that we’re zoomed in a little closer to our route, we can pan ahead of our
vessel with the cursor to review and create on-screen waypoints and navaids. Try
moving the cursor to select the ‘TOUR3’ waypoint— just use the R keypad to
move the cursor as close as possible to the waypoint. (To move the cursor in
small increments, try a series of short key presses.)
A. To enter a boat
speed or define the
simulated course,
highlight the ‘Setup
Simulator?’ option
and press
EDIT/ENTER.
B. Enter a boat speed of
60 knots to begin the
tour. This will allow
you to complete the Getting Started tour in 10-15 minutes.
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Page 17
GETTING STARTED
Reviewing & Creating Waypoints on the Map
Once the cursor is over the TOUR3 waypoint, you’ll notice that the waypoint
symbol and name will become highlighted, and the data field at the top of the
page will display the waypoint name, the range and bearing from your present
position, and the coordinates for the waypoint.
To review the waypoint page for a selected waypoint:
1. Press the T key.
2. To return to the map page, press T again.
The cursor can also be used to create new waypoints right from the map display.
To create a new waypoint using the cursor:
1. Use the R keypad to move the cursor as close as possible to the following
position: N 35º 02.129’; W 076º 26.106’ (Use the data window to verify the
cursor position.)
2. Press the T key to capture the cursor position.
3. Use the R key to highlight the waypoint symbol field.
4. Press T to access the symbol page.
5. Press the DOWN arrow of the R keypad twice to select the wreck symbol.
6. Press T to confirm, and T again to finish.
A. Create waypoints
from the map by
moving the cursor to
the desired position
and pressing the
EDIT/ENTER key.
B. The create new
waypoint page
assigns the next
available three-digit
number as the default name. If you are creating a waypoint at an on-screen
navaid, the icon and name will be used as the default symbol and comment.
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Page 18
GETTING STARTED
Navigation Page
Now that we’re navigating to an actual destination, let’s move on to the next
page of the GPSMAP 175 system, the navigation page:
1. Press the J key.
Compass Tape
Data
Fields
Graphic
Highway
Pointer to
Waypoint
CDI
Scale
The navigation page provides graphic steering guidance to your
destination. The bearing (BRG) and distance (DIS) to the destination, with
your current course (COG) and speed over ground (SOG), are displayed
at the top of the page, along with a compass tape to indicate your cardinal
heading. The estimated time enroute (ETE) and velocity made good
(VMG, or the rate you are closing in on your destination) are displayed at the
bottom of the page.
As you head toward the destination, the middle section of the page gives
you visual guidance to your waypoint on a graphic highway, which displays
the route and nearby waypoints on screen. The moving arrow below the
highway always points to the destination waypoint relative to the direction
you’re moving. The line down the center of the highway represents your
desired track, while the bottom of the page provides a graphic indication of
your crosstrack error (the distance and direction you are off course)
according to the scale at the bottom right of the page.
A. In this example, our
boat is right of course
by 1/16th of a mile.
(The base of the map
is equal to the scale
selected at the
bottom right of the
page.) To get back on
course, steer left.
18
B. Here, our boat is off
course to the left. To get back on course, steer right. A digital readout of your
crosstrack error can be displayed in any of the six data fields (see page 35).
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Page 19
GETTING STARTED
Using the Navigation Page
1
Whenever the GPSMAP 175 is in simulator mode, you can adjust your
speed and course from the navigation page using the R keypad. As you head
toward each waypoint in the tour route, try adjusting your boat speed and
course to get a feel for how the highway works.
To adjust the simulated boat speed:
1. Press the UP arrow of the R keypad to increase the speed in 5
knot/kph/mph increments. Press the DOWN arrow to decrease the speed
in the same increments.
To steer the boat:
1. Press the LEFT and RIGHT arrows of the R keypad.
Notice that as you get off course, the highway and waypoint pointer move
to guide you back on course. The base of the highway display also serves as a
graphic course deviation indicator (CDI), relative to the scale setting shown at
the bottom right of the page. The scale setting represents the total distance (or
the width) of the base of the highway display. The default graphic highway
setting is 1/4 nm, but can be set for a 1/2-, 1-, 2- or 4-nm range.
To change the highway display scale:
1. Press the Z key in either direction (up to increase, down to decrease).
The navigation page data fields may also be configured to display any of ten
different navigation values. Let’s change the VMG field to crosstrack error to
provide a digital readout of the distance we’re off course.
To change a data field:
1. Press the O key to display the position page options.
2. Highlight the ‘Change Data Fields?’ option and press T. The field highlight
will now appear in the top-left data field (starting with the BRG field).
3. Use the R keypad to move the field highlight to the VMG field and press T.
4. Highlight the ‘XTK’ option and press T, and press Q to finish.
A. To reset the
simulator to steer
the desired course
automatically,
select the ‘Auto
COG’ setting from
the options page.
B. The highway scale
perspective can be
set to a 1/4-, 1/2-,
1-, 2-, or 4-nm/mi/km range with the ZOOM keys.
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Page 20
GETTING STARTED
Active Route/Main Menu Page
Now that you’ve seen the four main pages, let’s review the active route
page, which will appear in the main page sequence whenever you are
navigating a route:
To access the active route page:
1. Press the J key.
The active route page shows each waypoint of the active route in sequence,
with the waypoint name, distance and estimated time enroute to each
waypoint displayed. As you navigate the route, the active route list will be
automatically update, indicating the next destination waypoint.
The active route page also provides quick access to many route activation,
editing and copying functions you’ll use most often, like inverting and
deactivating the active route. Let’s go ahead and deactivate the active route.
To deactivate the active route and stop navigation:
1. Press the O key.
2. Highlight the ‘Deactivate Route?’ option.
3. Press T to confirm.
To reset the boat speed to zero:
1. Press the O key.
2. Highlight the ‘Setup Simulator?’ option, and press T.
3. Press T to access the SOG field.
4. Press the LEFT arrow of the R keypad to clear the speed entry.
5. Press T.
A. To stop navigating
the active route,
select the
‘Deactivate Route?’
option and press
EDIT/ENTER.
B. Use the left arrow
key to clear the
SOG field and press
EDIT/ENTER to
confirm.
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Page 21
GETTING STARTED
Track Submenu & Clearing the Track Log
1
As you’ve seen, the GPSMAP 175’s main pages provide vital status,
position, navigation and map information. The last page we’ll cover in the tour
is the main menu page, which provides access to the GPSMAP 175’s
waypoint, route and planning functions, as well as various operational and
navigation setup features. The main menu is available from any page, and is
accessed through the O key.
To access the main menu page:
1. Press the O key twice.
The main menu page’s 11 submenus are divided into categories by
function. You can select a particular submenu by simply highlighting the
desired option and pressing T. To get a feel for how the main menu page
works, let’s clear out the track log we’ve created during our simulated tour.
This will ensure that you have a clean slate once you start navigating in your
home waters.
To select the track submenu:
1. Highlight the ‘Track’ menu option and press T.
The track log page allows you to specify whether to record a track plot and
define how it is recorded. It also provides both an indicator of the total
memory used and the individual functions to clear the track log and start a
TracBack route.
To delete the track log:
1. Highlight the ‘Delete Track’ option and press T. A confirmation prompt will
appear.
2. Highlight the ‘Yes’ prompt and press T to confirm.
3. Press J to return to the main page sequence.
Congratulations! You’ve now gone through the basic operation of the
GARMIN GPSMAP 175. Your new digital chartplotter is a powerful tool with
many advanced features not covered in the Getting Started tour. For detailed
instructions on using these features or performing a specific task, please refer
to the quick reference guide or the appropriate reference section of this manual.
A. The GPSMAP 175’s
track page lets you
clear the track log
and start a
TracBack route.
B. To delete the track
log, confirm the
warning page by
highlighting the
‘YES’ prompt and
pressing EDIT/ENTER.
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Page 22
GETTING STARTED
Power Off
To turn the GPSMAP 175 off:
1. Press and hold the P key for about 3 seconds, until the screen is blank.
Please read on and explore the Reference section— which contains a
closer look at all of the exciting features of the GPSMAP 175— or use the
Reference section as you need it. The GPSMAP 175 is one product you’ll
grow with as you learn more about it.
Thank you for choosing the GARMIN GPSMAP 175 navigation system. We
hope that it will be a useful tool for you wherever you travel.
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Page 23
STATUS PAGE
1
Overview
Status Field
Satellite
Sky View
Horizontal Accuracy
Dilution of Precision
Battery Gauge
Signal Strength
Indicators
Status Bar
Battery Icon
The GPSMAP 175 status page provides a visual reference of various
receiver functions, including current satellite coverage, receiver operating
mode, battery strength and current receiver accuracy. The status information
will give you an idea of what the receiver is doing at any given moment.
The sky view and signal strength bars give you an indication of what
satellites are visible to the receiver and whether or not they are being tracked.
The signal strength is shown on a bar graph for each satellite, with the satellite
number below. When a satellite is visible but not being tracked, the strength
bar will not be shown and the sky view indicator will not be highlighted.
The sky view shows a bird’s-eye view of the position of each satellite relative
to the receiver’s last known position. The outer circle represents the horizon
(track up), the inner circle is 45º above the horizon, and the center point is a
position directly overhead. Use the sky view to determine if there are
obstructions shading your reception of GPS signals.
A. Whenever the
GPSMAP 175 is
searching for
satellites, no signal
strength bars will
appear.
B. Once the receiver has
found the satellite(s)
indicated, a hollow
signal strength bar
will appear. After
satellite data has been collected, the signal strength bars will become solid.
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1
Page 24
STATUS PAGE
Receiver Status
Receiver status is indicated at the top of the page, with the current
estimated position error (EPE), dilution of precision (DOP), and battery
level to the left of the sky view. DOP measures satellite geometry quality on a
scale of one to ten (the lower the number the better). EPE uses DOP and other
factors to calculate a horizontal position error in feet or meters. Your GPSMAP
175 shows battery strength in two ways (see page 23): a battery gauge located
below the DOP measurement and a battery icon located on the status bar. Both
methods show continuous battery level updates when operating on battery
power. When using external power, the battery gauge and icon are not shown.
The status field will show one of the following conditions:
• Searching the Sky— the receiver is looking for any satellites.
• AutoLocate— the receiver is looking for any satellite whose almanac has
been collected. This process can take up to five minutes.
• Acquiring Satellites— the receiver is looking for and collecting data
from satellites visible at its last known or initialized position in order to
calculate a fix.
• 2D Navigation— at least three satellites with good geometry have been
acquired and a 2D position fix (latitude and longitude) is being
calculated. ‘2D Differential Navigation’ will appear when you are
receiving DGPS corrections in 2D mode.
• 3D Navigation— at least four satellites have been acquired, and your
position is now being calculated in latitude, longitude and altitude. ‘3D
Differential Navigation’ will appear when you are receiving DGPS
corrections in 3D mode.
• Poor GPS Coverage— the receiver isn’t tracking enough satellites for a
2D or 3D fix.
• Receiver Not Usable— the receiver is unusable, possibly due to
incorrect initialization or abnormal satellite conditions. Turn the unit off
and back on to reset.
• Simulating Navigation— the receiver is in simulator mode.
A. The status bar at the
bottom of the page
displays important
status, alarm,
battery level, and
map scale
information. It also
provides on-screen
user and message
prompts.
24
B. The status bar will display an anchor symbol or ‘PRX’ icon whenever the anchor
drag alarm or proximity alarm has been triggered.
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Page 25
STATUS PAGE
Options
1
The GPSMAP 175’s status page features a context-sensitive options
page that provides access to functions and features relating to the status
page.
To display the status page options:
1. Press O.
To select a menu option:
1. Highlight the desired option and press T.
The following options are available:
• Initialize Position?— allows you to initialize the receiver on the map
or by text. See pages 6-8 for instructions on initialization.
• Start AutoLocate?— allows the receiver to locate your position
automatically.
• Either Track Up/North Up SkyView?— allows you to select
between a north up or track up sky view display.
• Either Setup/Start Simulator?— allows you to define speed, course
and position values while in simulator mode. See the Getting Started
Tour for more on using simulator mode.
A. Whenever the
GPSMAP 175 is in
simulator mode, the
‘Setup Simulator?’
option will appear
on all the main
pages.
B. The simulated
heading, speed,
position and altitude
may be changed at any time.
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Page 26
POSITION PAGE
2
Overview
Compass
Tape
Data
Fields
Position
Coordinates
Time
of Day
Status Bar
The GPSMAP 175 position page shows you where you are, what direction
you are heading and how fast you are going. The top of the page features a
graphic compass tape to indicate your cardinal heading (while you’re
moving), and four user-selectable data fields: course over ground (COG),
speed over ground (SOG), distance traveled (TRP) and altitude (ALT). The
bottom half of the page displays your present position’s coordinates, along
with the time of day as calculated using GPS satellites. The status bar at the
bottom of the page indicates position fix status, and is described in detail on
page 24.
The units of measure for speed, distance, position and altitude are all userselectable through the navigation setup option on the main menu page. The
time of day, shown in UTC (Universal Time Coordinated, or Greenwich Mean
Time) may be set to display in a 12- or 24-hour time format (with a local
offset) through the system setup option on the main menu page.
The trip odometer can be reset
from the position page options
window. To reset the odometer,
select the ‘Reset Trip Distance?’
option and press EDIT/ENTER.
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POSITION PAGE
Position Page Options
2
The GPSMAP 175’s position page features a context-sensitive options
page that provides access to functions and features relating to the
position page.
To display the position page options:
1. Press O.
To select a menu option:
1. Highlight the desired option and press T.
The following options are available:
• Reset Trip Distance?— resets the trip odometer (TRP) field to zero.
• Change Data Fields?— allows you to choose the data displayed in
the four user-selectable data fields. Five data types are available:
• COG— course over ground
• SOG— speed over ground
• TRP— distance traveled
• ALT— altitude
• VDC— DC voltage
To change a data field:
1. Highlight the ‘Change Data Fields?’ option and press T.
2. Move the field highlight to the field you want to change and press T.
3. Select the desired data field option and press T.
• Restore Defaults?— resets all data fields to the factory settings.
• Setup Simulator?— allows you to define speed, course and position
values while in simulator mode. See the Getting Started Tour for more
on using simulator mode.
A. The four data fields
at the top of the
position page can be
changed by selecting
the ‘Change Data
Fields?’ option.
B. Each data field can
be set to display
speed over ground,
course over ground,
distance traveled, altitude or DC voltage.
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Page 28
MAP PAGE
3
Overview
Data
Window
Boat
Icon
Status
Bar
Map
Scale
The GPSMAP 175’s map page provides a comprehensive display of
electronic cartography, plotting and navigational data. The map display
shows your boat on a digital chart, complete with geographic names, navaids,
depth contours and a host of other chart features. It also plots your track and
displays any routes and waypoints you create. An on-screen cursor lets you
pan and scroll to other map areas, determine the distance and bearing to a
position, and perform various route and waypoint functions.
The data window, located at the top of the page, provides a userselectable display of your current course and speed over ground, along with
the bearing and distance to a destination waypoint. Whenever the cursor is
active, a pop-up window will appear below the data window to indicate the
position, range and bearing to the cursor or a selected waypoint or navaid.
Each data field may be configured to display any one of ten data options. The
data window may also be changed to display additional data fields, a graphic
compass tape, or a CDI scale. The status bar at the bottom of the page
displays the map scale currently in use.
A. Use the cursor to
pan ahead to other
map areas. The
map display will
scroll forward when
you reach the edge
of the map.
28
B. To select or
‘highlight’ an onscreen navaid or
waypoint, simply move the cursor over the waypoint symbol. The cursor will
‘snap’ to the waypoint, and display its name and position in the data field.
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MAP PAGE
Map Modes
3
The map display uses the cursor keypad and a set of hard keys to control
most map display functions. The Z key, combined with the R keypad, let
you select zoom ranges and move the cursor. Two basic map operating modes,
position mode and cursor mode, determine what cartography is shown on the
map display. Boat mode pans the cartography to keep the present position
marker within the display area, while cursor mode pans the cartography to
keep the cursor within the display area.
Your GPSMAP 175 will always power up in the position mode, with your
vessel centered on the map display.
• Whenever sufficient map coverage is not available to keep the boat centered,
the boat icon will move toward the edge of the display.
• If the boat icon attempts to go off the display, the zoom level may need to be
adjusted to keep cartography on screen.
Whenever the R keypad is pressed, the GPSMAP 175 will enter cursor
mode. In cursor mode:
• The cursor can be moved over the map display using the R keypad.
• Whenever the cursor reaches the edge of the display, the map will scroll
forward under the cursor. Keep in mind that the boat icon will move with the
map scrolling and may go off the display screen. (You may not be able to see
your present position.)
• When the cursor is stationary, a fixed coordinate position will appear in the
position field. Note that the distance and bearing will change as the boat’s
position changes.
• Whenever you zoom in cursor mode, the cursor will be centered on screen.
• To return to position mode, press the Q key.
A. Position mode on
inland water
cartography.
B. Cursor mode on
inland water
cartography.
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Page 30
MAP PAGE
Using the Cursor
The cursor allows you to pan away from your present position and scroll
to other map areas around the world (even outside of your current G-chart
coverage). As you pan past the edge of the current map display, the screen will
actively scroll forward to provide continuous map coverage.
To move the cursor:
1. Press the R keypad to move the cursor in an up, down, left or right direction.
As you move the cursor, the distance and bearing from your present
position to the cursor will be displayed in the data window, along with the
cursor’s position coordinates. Keep in mind that when the cursor is stationary,
the distance and bearing from your present position will change as your boat
moves. The cursor may also be used to “snap” to on-screen waypoints and
navaids, allowing you to review a selected position directly from the map display.
To select an on-screen waypoint or navaid with the cursor:
1. Use the R keypad to move the cursor to the desired waypoint or navaid.
(If there are several waypoints grouped closely together, zoom in closer
for a better view.)
2. When a waypoint or navaid is selected, it will become highlighted on
screen, with the name and position displayed.
To eliminate the cursor and re-center your position on-screen:
1. Press the Q key.
The cursor may also be used to create new waypoints directly from the map.
To create a waypoint with the cursor:
1. Use the R keypad to move the cursor to the desired map position.
2. Press T.
3. Press T to confirm the new waypoint.
A. To create a new
waypoint at the
cursor, move the
cursor to the desired
position and press
EDIT/ENTER.
B. The create new
waypoint page will
appear, where you
may change the
waypoint name, symbol and comment before saving the waypoint.
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Page 31
MAP PAGE
Selecting Map Scales
3
The map display has 16 available range scales from 1/8th to 4096 n.m. (1/4
to 7500km). The map scale is controlled by the Z key, with the current scale
displayed at the bottom of the data window.
To select a map scale:
1. Press up on the
zoom in.
Z key to zoom out and down on the Z key to
The GPSMAP 175’s system has a built-in worldwide database to 64
n.m.(see Appendix F for a built-in coverage map), with more detailed
coverage available through the use of G-chart data cartridges (see Section 10
for installing and using G-chart cartridges). The GPSMAP 175 will display
cartography as long as there is chart information available for the range you’ve
selected. Map coverage will conform to the following conditions:
• When the selected zoom range is covered by either the internal database or
a G-chart data cartridge, cartography will be displayed.
• When the selected zoom range is covered by both the internal database and
a G-chart cartridge, cartography will be displayed using the data with the
best resolution.
• When the selected zoom range exceeds the resolution of the chart in use by
up to two settings, overzoom cartography will be displayed. The display will
not show any filled landmass areas, and an ‘Ovr Zm’ warning will appear
in the scale field. The lat/lon grid will also be turned on regardless of the map
configuration setting.
• When the selected zoom range exceeds the resolution of the chart in use by
more than two settings, all cartography will be replaced by a track plot
display, and a ‘No Map’ warning will appear in the scale field. The lat/lon
grid will be displayed regardless of the map configuration setting. Additional
caution should be used while navigating in track plot mode.
A. Whenever the
selected map scale
exceeds the
resolution of the
chart by up to two
settings, an ‘Ovr
Zm’ warning will
appear in the scale
field.
B. Whenever the
selected map scale exceeds the resolution of the chart by more than two settings,
a ‘No Map’ warning will appear in the scale field.
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Page 32
MAP PAGE
Map Page Options
The GPSMAP 175 map page is designed to be a flexible tool that can be
custom-tailored to your exact navigation needs. The map options page
provides access to many of the features and functions that will help you
configure the map page to your own preferences.
To display the map page options:
1. Press O.
To select a menu option:
1. Highlight the desired option and press T.
The following options are available:
• Maximize/Normal Map?— allows you to select between a fullscreen map display or the default map display with data window.
• Map Outlines Off/On?— allows you to specify whether or not
coverage outlines for G-chart cartography are displayed. The default
setting is on.
• Measure BRG/DIS?— allows you to measure the bearing and
distance between any two points on the map display.
To measure the BRG/DIS between two points:
1. Highlight the ‘Measure BRG/DIS?’ option and press T. An on-screen
pointer will appear on the map display at your present position.
2. Move the cursor to the desired reference point (the point that you want
to measure from) and press T.
3. Move the cursor to the point that you want to measure to. The bearing
and distance from the reference point will be displayed at the bottom
left of the data window.
4. Press the Q key to finish.
A. The map options
page provides access
to all map
configuration, page
display and data
field options.
B. The ‘Maximize
Map?’ option will
eliminate the data
fields and show fullscreen cartography.
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Page 33
MAP PAGE
Map Configuration
3
• Configure the Map?— allows you to determine what chart features are
displayed on a particular map scale to prevent excessive clutter. The map
configuration page features an on/off grid with a list of chart features down the
left side. The zoom scales are displayed across the top of the grid with the
chart scale currently in use also indicated. The far-left scale setting represents
all map scales 64 nm and above. A check mark in a grid box indicates that the
chart feature listed will be displayed at the corresponding scale.
Individual grid boxes may be turned on and off through a popup scale
window, while entire rows may be controlled by using the map configuration
options page (accessible through the O key).
To use the map configuration grid:
1. Use the R keypad to select the desired map item and press T. A popup
window will appear with the current settings displayed.
2. Use the R keypad to highlight the scale you want to change.
3. Press T to change the on/off setting.
4. Press Q to finish.
To turn an entire row on or off:
1. Use the R keypad to select the desired map item.
2. Press the O key.
3. Select the ‘Enable Row?’ or ‘Disable Row?’ option and press T.
The map configuration page also allows you to set the moving map display
to a North Up, Track Up or Desired Track Up orientation.
To change the map orientation:
1. Use the R keypad to highlight the ‘Orientation’ field and press T.
2. Select the desired setting and press T.
A. The map
configuration grid
allows you to define
what items appear
on the display at
each map scale.
B. To turn an entire
row on for the
selected map item,
highlight the ‘Enable
Row?’ option and press EDIT/ENTER.
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Page 34
MAP PAGE
Map Configuration & Map Colors
The map configuration options page also features a map calibration
function that allows you to calibrate the map display with your exact physical
surroundings or correct data from older charts. Before using the map
calibration function, check to make sure that your map datum selected on the
GPS matches the datum on the chart you are using (see page 84-88). To
calibrate the map display, you must know exactly where you are, and
understand that the correction is generally valid only in a limited range from
the point of correction.
Map calibration should only be performed while your vessel is not moving,
and should never be used to attempt SA corrections, which can degrade
accuracy up to 330’ (100 meters). The maximum correction is 16,400 feet (5000m).
To calibrate the map:
1. Select the ‘Calibrate the Map?’ option and press T.
2. Use the R keypad to move the arrow cursor from the satellite position
(indicated by the satellite icon) to your exact position. The bearing,
distance and position will be indicated in the data window.
3. Press T to confirm the calibration offset.
The next option available from the map configuration page is the set map
colors option, which allows you to define the fill color (grayscale) of the land
and water used on the map display. Three options are available: no color (no
fills for land or water), gray land/white water (the default setting), and white
land/gray water.
To select a map colors option:
1. Select the ‘Set Map Colors?’ option and press T.
2. Highlight the desired map color option and press T.
The map configuration options page also features a ‘restore defaults’
function that can be used to quickly restore all map configuration options to
the factory settings.
To restore the map configuration options to the factory defaults:
1. Highlight the ‘Restore Defaults?’ settings and press T.
A. To calibrate map,
highlight ‘Calibrate
the Map?’ option and
press EDIT/ENTER.
34
B. A satellite icon will
remain on the map
to indicate the GPS
position, while the
boat marker will
reflect calibration
Caution: The map calibration function should never be used
changes.
to attempt corrections to Selective Availability errors.
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MAP PAGE
Page Display & Data Fields
3
• Setup Page Display?— allows you to specify the number of fields
displayed in the data window section of the map page. A graphic
compass tape or CDI scale may also be displayed. The following options
are available:
• 2 Fields
• 2 Fields& Compass
• 2 Fields & CDI
• 4 Fields
• 4 Fields & Compass
• 4 Fields & CDI
• 6 Fields
• 6 Fields & Compass
• 6 Fields & CDI
• 8 Fields
To select a page display option:
1. Highlight the ‘Setup Page Display?’ option and press T.
2. Select the desired option and press T.
• Change Data Fields?— allows you to specify the data displayed in
each data field used on the map display. The following options are available:
• BRG- bearing to active wpt
• DIS- distance to active wpt
• SOG- speed over ground
• COG- course over ground
• ETE- estimated time enroute
• ETA- estimated time of arrival
• XTK- crosstrack error
• VMG- velocity made good
• TRN- turn angle to wpt
• WPT- active wpt name
To change a data field:
1. Highlight the ‘Change Data Fields?’ option and press T.
2. Move the field highlight to the desired field and press T.
3. Select a data field option and press T.
• Restore Defaults?— resets all map page options (except map
configuration options; see pages 33-34) to the factory settings.
• Setup Simulator?— allows you to define speed, course and position
values while in simulator mode. See the Getting Started Tour for more
on using simulator mode.
A. The map page can be
configured to display
a variety of
navigation data.
B. Each data field can
be set to display one
of ten data options.
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4
Compass
Tape
Page 36
NAVIGATION PAGE
Overview
Data
Fields
Graphic
Highway
Pointer to
Waypoint
CDI
Scale
Whenever a GOTO, MOB, TracBack or route has been activated, the
GPSMAP 175 will provide digital and graphic steering guidance to the
destination with the navigation page. The top half of the nav page features
four user-selectable data fields that display the bearing (BRG) and distance
(DIS) to waypoint, along with your current course (COG) and speed over
ground (SOG). In addition, there’s a moving compass tape to indicate your
cardinal heading. Two additional data fields at the bottom of the page show
the estimated time enroute (ETE) and velocity made good (VMG) to your
destination.
The middle section of the screen provides visual guidance to the waypoint
on a graphic highway display. The line down the center of the highway
represents your desired track, while a graphic indication of the distance and
direction you are off course is shown on a scale at the bottom right of the page.
(The selected scale represents the distance from side to side.) The arrow
pointer below the highway always points to the destination waypoint relative
to the direction you are moving.
A. The navigation page
can be configured to
show the active
waypoint, all route
waypoints and/or
nearby waypoints on
the graphic highway.
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Page 37
NAVIGATION PAGE
CDI Scale & Nav Page Options
4
As you head toward your destination, the highway perspective will move
to indicate your progress to the waypoint and which direction you should
steer to stay on course. If you are navigating a route, the navigation page will
show each route waypoint in sequence, with the active leg indicated by the
white portion of the highway. Nearby waypoints not in the active route will
also be displayed. The highway perspective scale may also be zoomed in or
out to display a larger or smaller view of the highway. Five settings are
available from 1/4 to 4 nm, with a default setting of 1/4 nm.
To change the highway perspective scale:
1. Press the up or down arrow of the Z key to select the desired setting.
2. Press T to confirm.
Navigation Page Options
The GPSMAP 175’s navigation options page allows you to define the nav
data fields and select what waypoints are displayed on screen.
To display the navigation page options:
1. Press O.
To select a menu option:
1. Highlight the desired option and press T.
A. To change the
highway scale
perspective, press
the ZOOM keys.
B. The navigation
options page lets
you set up the
navigation page to
your own
preferences.
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4
Page 38
NAVIGATION PAGE
Nav Page Options
The following options are available for the navigation page:
• Change Data Fields?— allows you to define the data displayed in any
of the six user-selectable data fields. Ten data options are available:
• BRG– bearing to active wpt
• DIS– distance to active wpt
• SOG– speed over ground
• COG– course over ground
• ETE– estimated time enroute
• ETA– estimated time of arrival
• XTK– crosstrack error
• VMG– velocity made good
• TRN– turn angle to wpt
• CTS– course to steer
To change a data field:
1. Highlight the ‘Change Data Fields?’ option and press T.
2. Highlight the field you want to change and press T.
3. Select the desired data field option and press T.
• Configure Highway?— allows you to select what waypoints are shown
on the highway display. Four options are available:
• Nav & Nearest Waypoints— all route and nearest waypoints displayed
• Nav Waypoints— only waypoints in the active route will be displayed
• Active Waypoint— only the active waypoint will be displayed
• No Waypoints— no waypoints will be displayed
To configure the highway display:
1. Highlight the ‘Configure Highway?’ option and press T.
2. Select the desired option and press T.
• Restore Defaults?— resets all navigation page options to the factory settings.
• Setup Simulator?— allows you to define speed, course and position
values while in simulator mode. See pages 10-22 for more details on
using simulator mode.
• Auto COG?— allows you to reset automatic steering while simulating
navigation and cancel any course adjustments made with the R keypad.
A. Ten data options are
available for each
data field. The
digital crosstrack
error option is
useful to display the
exact distance you
are off course in
feet/miles or meters.
38
B. To select what
waypoints appear on the graphic highway, highlight the desired setting and press
EDIT/ENTER.
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Page 39
MAIN MENU PAGE
Overview
5
The GPSMAP 175’s main menu page provides access to various waypoint,
system, navigation and interface management and setup menus. The main
menu page is available from any page in the GPSMAP 175’s system, and is
accessed through the O key.
To access the main menu page:
1. Press O twice.
The 11 submenus are divided into categories by function.
To select a submenu from the main menu page:
1. Highlight the submenu you want to view and press T.
For specific instructions on using a submenu, see the waypoints, route or
setup sections of this manual.
A. The waypoint
category options on
the main menu page
are described in the
Waypoints section
on pages 40-48.
B. The routes category
options are
described on pages
53-60.
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Page 40
WAYPOINTS
Creating Waypoints and the MARK Key
The GARMIN GPSMAP 175 stores up to 250 alphanumeric waypoints with
a user-defined icon and comment available for each waypoint. Waypoints can
be created using three basic methods:
• M key– used primarily for marking your present position, the M
key also provides options that allow you to select a map or navaid
position from the map display.
• On Map– allows you to define a new waypoint position from the map
display using the cursor.
• Text Entry– allows you to enter a new waypoint’s position
coordinates manually (from a chart, etc.) or by referencing it’s bearing
and distance from a stored waypoint or your present position.
Mark Key
The GARMIN GPSMAP 175’s M key lets you quickly capture your
present position— or cursor or navaid position— in order to create a new
waypoint. You must have a valid position fix to mark your present position.
To mark your present position:
1. Press the M key. The mark position page will appear, with a default
three-digit name for the new waypoint.
2. To accept the waypoint with the default name, symbol and comment (the
date and time of creation), press T to confirm the ‘Done?’ prompt.
3. To enter a different name, symbol or comment, highlight the appropriate
field and press the T key.
4. After entering and confirming your changes, move the field highlight back
to the ‘Done?’ prompt and press T.
A. The mark key is
used to mark your
present position, or
can be used to mark
the cursor or navaid
position.
40
B. The mark position
page also allows you
to add the new
waypoint to the end
of a route. You can
also create a series of waypoints with the mark key and save them to an open storage
route. When you’re ready, simply invert the route to get back (see page 57).
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WAYPOINTS
Using the MARK Key
6
The mark key may also be used on the map page to mark the cursor
position or an on-screen navaid. To mark a navaid, select the desired navaid
with the cursor. The GPSMAP 175 will use the navaid text shown on the
cartography as the default comment.
To mark the cursor or navaid position with the M key:
1. Use the R keypad to move the cursor to the desired position or navaid.
2. Press the M key.
3. Highlight the ‘Use Map Posn?’ or the ‘Use NAVAID Posn?’ option and
press T.
4. To accept the waypoint with the default name, symbol and comment (the
date and time of creation), press T to confirm the ‘Done?’ prompt.
5. To enter a different name, symbol or comment, highlight the appropriate
field and press the T key.
6. After entering and confirming your changes, move the field highlight back
to the ‘Done?’ prompt and press T.
A. To create a
waypoint at an onscreen navaid, move
the cursor over the
desired navaid.
B. Press the MARK key
and select the ‘Use
Navaid Posn?’
option. Press
EDIT/ENTER to
finish.
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Page 42
WAYPOINTS
Creating Waypoints On Map & By Text
Waypoints may also be quickly created from the map display, which allows
you to “point and shoot” at any map position to create a new waypoint.
To create a new waypoint on the map:
1. Use the R keypad to move the cursor to the desired map position. If you
want to create the new waypoint at an on-screen navaid, highlight the
navaid on the map display.
2. Press T.
3. To accept the waypoint with the default name, symbol and comment,
press T. If you are creating a waypoint at an on-screen navaid, the
default symbol and comment will automatically reflect the selected
navaid’s name and symbol.
4. To change the name, symbol or comment, highlight the appropriate field
and press T.
5. After entering and confirming your changes, move the field highlight back
to the ‘Done?’ prompt and press T.
Creating Waypoints By Text Entry
Waypoints may also be created by manually entering a position’s
coordinates or referencing a stored waypoint through the ‘Create Waypoint’
submenu option on the main menu page.
To create a new waypoint by manually entering its coordinates:
1. Press O twice to display the main menu page.
2. Highlight the ‘Create Waypoint’ option and press T. The waypoint
definition page will appear, with the next available waypoint number and
the receiver’s last known position as the default name and position.
3. Use the R keypad to enter the new waypoint name, icon, position and
comment. Press T after the last character in each section.
4. When you have finished entering all your waypoint data, use the R
keypad to highlight the ‘Done’ prompt and press T.
A. Once a position has
been selected on the
map, the create new
waypoint page will
appear. Here you
can change the
waypoint name,
symbol or comment
before saving the
waypoint.
B. To create a waypoint by text entry, start by entering the new waypoint’s name.
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Page 43
WAYPOINTS
Creating a Waypoint by Reference
6
A new waypoint may also be created without knowing position coordinates
by entering its range and bearing from an existing waypoint or your present
position. The GPSMAP 175 will then calculate the position coordinates for
you, using the reference selected.
To create a new waypoint using a reference waypoint:
1. Select the ‘Create Waypoint’ option from the main menu page and press T.
2. Enter the name, icon and comment for the new waypoint.
3. Highlight the reference waypoint field and press T.
4. Enter the name of the reference waypoint using the R keypad, or press
O to select the waypoint from the nearest list, waypoint list, or map
display. Leave the reference field blank to use your present position.
5. Press T to begin entry of the bearing from your reference waypoint to
the new waypoint position. Enter the bearing and press T.
6. Press T to begin entry of the distance from your reference waypoint to
the new waypoint position. Enter the distance and press T. The position
for the new waypoint will automatically be calculated.
7. Press T to confirm the ‘Done’ prompt.
A. Enter the bearing
from the reference
waypoint to the new
waypoint in the
‘BRG’ field.
B. Enter the distance
from the reference
waypoint to the new
waypoint in the
‘DIS’ field.
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WAYPOINTS
Reviewing & Editing Waypoints
Once you have created and stored a waypoint, it may be modified,
reviewed, renamed or deleted at any time through the waypoint definition
page. The waypoint definition page is available for any stored waypoint by
highlighting the desired waypoint from the map display or selecting it from
any waypoint list and pressing the T key.
To access the waypoint definition page:
1. Use the R keypad to highlight the desired waypoint on the map display
(or any waypoint list).
2. Press T to display the waypoint definition page.
From the waypoint definition page, you may change the waypoint symbol,
position coordinates, or the waypoint comment for the selected waypoint.
To change the waypoint symbol:
1. Highlight the waypoint symbol field and press T.
2. Use the R keypad to select the desired symbol and press T to confirm.
To change the position coordinates:
1. Highlight the coordinates field and press T.
2. Use the R keypad to edit the coordinates and press T to confirm.
To change the waypoint comment:
1. Highlight the comment field and press T.
2. Use the LEFT arrow of the R keypad to clear the comment field
3. Use the R keypad to enter a comment (up to 16 characters).
4. Press T to confirm.
A. The waypoint
definition page will
appear whenever a
waypoint is selected
from the map or a
waypoint list.
B. A 20-character
custom waypoint
comment may be
assigned to every
waypoint. The default comment is the date and time of creation.
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WAYPOINTS
Waypoint Definition Page Options
6
The waypoint definition page also features an options page that allows you
to edit the selected waypoint on the map display, rename the selected
waypoint or delete the waypoint from memory.
To display the waypoint definition page options:
1. Press the O key.
To review/edit the selected waypoint from the map display:
1. Highlight the ‘Edit Wpt On Map?’ option and press T.
2. The selected waypoint will appear on the map display, with the waypoint
name and coordinates shown at the top of the map, along with the
distance and bearing to the waypoint from your present position.
3. To move the selected waypoint’s position, press T. A ‘MOVE’ label will
now appear under the cursor arrow.
4. Use the R keypad to move the cursor arrow to the desired position. The
cursor’s coordinates, along with the distance and bearing from your
present position, will be displayed at the top of the map display.
5. Press T to set the waypoint’s new position, and Q to return to the
waypoint definition page.
To rename the selected waypoint:
1. Highlight the ‘Rename Waypoint?’ option and press T.
2. Enter the new waypoint name and press T.
3. Press T to confirm the ‘Yes’ prompt.
To delete the selected waypoint:
1. Highlight the ‘Delete Waypoint?’ option and press T.
2. Press T to confirm.
A. To review or edit a
waypoint on the
map display, select
the ‘Edit Wpt On
Map?’ option.
B. To move the selected
waypoint, press
EDIT/ENTER. Use
the arrow keypad to
select the new
position, and press EDIT/ENTER to finish.
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Page 46
WAYPOINTS
Waypoint Submenus & Nearest Waypoints
The GPSMAP 175’s main menu page features four waypoint submenus that
let you manage a large number of waypoints quickly and efficiently. The
submenus also provide a continuously updated nearest waypoints list and a
proximity waypoint alarm function that can be used to define an alarm circle
around submerged hazards, shallow waters, etc.
To access the main menu page/waypoint submenus:
1. Press O twice.
The first waypoint submenu is the nearest waypoints list, which shows
the nine nearest waypoints that are within 100 miles of your present position.
The nearest waypoints are continuously updated to your present position, and
provide quick access to the closest points of safety in emergency situations.
To scroll through and review the nearest waypoint list:
1. Highlight the ‘Nearest Waypoints’ option and press T.
2. Use the R keypad to scroll through the list in either direction.
3. Press T to review the highlighted waypoint.
4. To return to the waypoint list, press T to confirm the ‘Done?’ prompt.
5. The field highlight will automatically scroll to the next waypoint. If you
want to review each waypoint, you can scroll through any waypoint list by
pressing the T key repeatedly.
To select a nearest waypoint as a GOTO destination:
1. Use the R key to select the desired GOTO waypoint.
2. Press G, followed by T.
A. The main menu
page features four
waypoint submenus.
B. The nearest
waypoint list
continuously
updates to show the
nine nearest
waypoints to your
present position.
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Page 47
WAYPOINTS
Proximity Waypoints
6
The proximity waypoints list lets you define an alarm circle around a
stored waypoint position, and can be used to help you avoid reefs, rocks or
restricted waters. Up to nine waypoints may be listed, with a maximum alarm
radius of 99.9 nautical or statute miles or kilometers. If a proximity alarm circle
overlaps with an existing alarm circle, a ‘Proximity Overlap’ message will
appear each time the unit is turned on. If you enter an alarm circle overlap, you
will only be alerted to the closest proximity waypoint.
To enter a proximity waypoint:
1. Highlight the ‘Proximity Waypoint’ option and press T.
2. Use the R key to highlight the first blank waypoint field and press T.
3. Enter the name of the proximity waypoint using the R keypad, or press
O to select the waypoint from the nearest waypoint list, waypoint list, or
map display.
4. Press T to confirm. The distance field will now be highlighted.
5. Press T to begin entry of the proximity radius.
6. Use the R keypad to enter a distance value (to 99.99 units) and press T.
To turn proximity alarms on or off:
1. Use the R keypad to highlight the alarms on/off field and press T.
2. Select the desired setting and press T.
To remove a proximity waypoint from the list:
1. Use the R keypad to highlight the waypoint to be removed.
2. Press O.
3. Highlight the ‘Clear Alarm?’ field and press T.
4. To clear all proximity waypoints, select the ‘Clear All’ option and press T.
A. When you enter a
proximity
waypoint’s alarm
circle, ‘PRX’ will
appear in the status
bar. (Providing the
alarm is on.) Once
out of the alarm
circle, the proximity
indicator will
automatically reset.
B. Clear all proximity waypoints by selecting ‘Clear All?’ from the proximity options
page. Finish the deletion by confirming the ‘Yes’ prompt.
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WAYPOINTS
Create Waypoint and Waypoint List
The third waypoint submenu available from the main menu page is the
‘Create Waypoint’ submenu, which allows you to create a new waypoint by
manually entering coordinates. Instructions for using the create waypoint
submenu are provided on page 42.
Waypoint List
The last waypoint category available from the main menu is the waypoints
list, which displays a master list of all waypoints currently stored in memory.
From the waypoints list, you may review, edit, rename or delete individual
waypoints; or delete all user waypoints. The total number of stored and
available waypoints is displayed at the top of the waypoints page, with the
stored waypoints arranged in numerical/alphabetical order and listed in two
columns in the center of the page.
To scroll through and review the waypoint list:
1. Highlight the ‘Waypoints’ option from the main menu page and press T.
2. Use the R keypad to scroll through the list in the desired direction.
3. Press T to review a highlighted waypoint.
4. Press T to return to the list.
To delete an individual waypoint from the list:
1. Use the R keypad to highlight the waypoint to be deleted and press O.
2. Press T.
3. Press the T key to confirm the deletion warning.
To delete the entire waypoint list:
1. Press the O key to select the options window.
2. Highlight the ‘Delete All User Wpts?’ option and press T.
3. Use the R keypad to highlight the ‘YES’ prompt and press T to confirm.
A. The waypoints list
displays all stored
waypoints in a twocolumn format.
Temporary
waypoints (from the
TracBack feature)
are assigned a
‘T___’ name and a
footprint symbol.
48
B. The waypoints list options page lets you delete individual waypoints or the entire
waypoint list.
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Page 49
GOTO/MOB
Selecting a GOTO Destination
7
The GPSMAP 175 provides four ways to navigate to a destination: GOTO,
MOB, TracBack and route navigation. The most basic method of selecting a
destination is the GOTO function, which lets you select a waypoint as your
destination and quickly sets a direct course from your present position. The G key
can be used in three ways: from a list of waypoints, graphically from the map display
and from a list of GOTO options. Pressing the G key once displays a list of all
waypoints in memory, from which you can select a single destination waypoint.
To activate a GOTO from the waypoint list:
1. Press the G key.
2. Select a waypoint and press T.
Selecting a GOTO On the MAP
Pressing the G key twice allows you to select an on-screen waypoint, navaid
or cursor position, on the map, as a destination. An on map GOTO may be used
to select one of three options from the map display: an existing waypoint, an onscreen navaid, or a cursor position. If you are selecting a navaid or a new position
as the GOTO destination, the GPSMAP 175 will automatically create or move a
waypoint named ‘MAP’ at the navaid or map position.
To activate a GOTO from the map display:
1. Press the G key twice.
2. To select an existing user waypoint, highlight the waypoint on screen and press
T.
3. To select a navaid, highlight the navaid on screen and press T. The GOTO
new waypoint page will appear, displaying the navaid’s position as a ‘MAP’
waypoint, with the navaid symbol and text as the default icon and waypoint
comment. Press T to save the waypoint and begin navigation.
4. To select a cursor position as your destination, move the arrow cursor to the
desired position and press T. The GOTO new waypoint page will appear and
display the position as the ‘MAP’ waypoint. Press T to save the waypoint
and begin navigation.
A. Press GOTO to select
a destination
waypoint.
B. Press GOTO twice to
select a destination
waypoint with the map
cursor. If not
navigating to an
existing waypoint, a
waypoint named
‘MAP’ will be created.
MAP is overwritten for each MAP GOTO. This allows navigation to on-screen navaids
without permanently storing them. Rename MAP to save it permanently (See page.43).
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Page 50
GOTO/MOB
GOTO Options
The GOTO options page provides a list of additional GOTO options that
let you start a TracBack route, select a destination waypoint from the nearest
waypoints list, select a route to navigate, or cancel the current GOTO destination.
To display the GOTO options:
1. Press O.
To select a menu option:
1. Highlight the desired option and press T.
The following options are available:
• Start TracBack?— allows you to create and start navigation of a
TracBack route back to the oldest track log point in memory. (See pages
51-52 for more on using the TracBack function.)
• Show All Waypoints?— displays the GOTO waypoint list.
• Show Nearest Waypoints?— allows you to select the GOTO
destination from a list of the nine nearest waypoints to your present position.
To select a nearest waypoint as a GOTO destination:
1. Highlight the ‘Show Nearest Waypoints’ option and press T.
2. Select the desired waypoint and press T.
• Select Route?— allows you to quickly select a stored route for navigation.
To select a route to navigate:
1. Highlight the ‘Select Route’ option and press T.
2. Select the desired route and press T.
• Cancel GOTO?— cancels the current GOTO destination and resumes
navigation of any previously selected route.
A. The GOTO options
page lets you start a
TracBack route,
select a destination
from the nearest list,
select a route to
activate, or cancel
the current GOTO
destination.
50
B. The nearest
waypoints list provides quick access to nearby anchorages, facilities, etc. which
are stored as waypoints.
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GOTO/MOB
MOB & TracBack Navigation
7
The GPSMAP 175’s man overboard (MOB) function lets you
simultaneously mark and set a course to a position for quick response to
emergency situations.
To activate the MOB function:
1. Press the B key.
2. Press the T key to confirm and begin navigating to the MOB position.
Once a MOB has been activated, a MOB icon will appear on the map
display, and the destination field on the map page will display the bearing,
distance, and ETE to the MOB position based on your present speed and course.
To stop navigation to the MOB position:
1. Press the G key, followed by O, to display the GOTO options page.
2. Select the ‘Cancel GOTO’ option and press T.
TracBack Navigation
The third method of navigating to a destination is by using the GPSMAP
175’s TracBack feature. The TracBack function allows you to retrace your
path using the track log automatically stored in the receiver’s memory, which
will eliminate the need to store waypoints along the way. TracBack routes are
created by reducing your track log into a route of up to 30 waypoints and
activating an inverted route along those points. Once activated, a TracBack
route will lead you back to the oldest track log point stored in memory, so it’s
good idea to clear the existing track log at the start of your current trip (e.g.,
your dock) before you get started.
To clear the track log and define a starting point for a TracBack route:
1. Press the O key twice to display the main menu page.
2. Highlight the ‘Track’ option and press T.
3. Select the ‘Delete Track?’ option and press T.
4. Highlight the ‘Yes’ field and press T.
A. The MOB mode can
be used to set a course
to a passing spot for
quick response to an
emergency, fish
strikes, etc. If you
want to save the
MOB waypoint, be
sure to rename it, as
it will be overwritten
the next time a MOB is executed.
B. To define a starting point for a TracBack route, clear the track log.
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Page 52
GOTO/MOB
TracBack Navigation
To activate a TracBack route:
1. Press the G key, followed by the O key.
2. Highlight the ‘Start TracBack?’ option and press T.
Once a TracBack has been activated, the GPSMAP 175 will take the track log
currently stored in memory and divide it into segments called “legs”. Up to 30
temporary waypoints (e.g. T001) will be created to mark the most significant
features of the track log in order to duplicate your exact path as closely as possible.
• Always clear the track log at the point that you want to go back to (dock, etc.).
• The ‘RECORD’ option on the track log setup page must be set to ‘Fill’ or ‘Wrap’.
• There must be at least two track log points stored in memory to create a
TracBack route.
• If there are not enough available waypoints in memory to create a
TracBack route, you will be alerted with a ‘waypoint memory full’
message, and the receiver will use available waypoints to create a route
with an emphasis on the track log closest to the destination.
• If the track log interval is set to the ‘Time’ option, the route may not follow
your exact path. (Keep the interval set to resolution for best performance.)
• If the receiver is turned off or satellite coverage is lost during your trip,
the TracBack will draw a straight line between any point where coverage
was lost and where it resumed.
• If the changes of direction and distance of your track log are very
complex, 30 waypoints may not accurately mark your exact path. The
receiver will then assign the 30 waypoints to the most significant points
of your track, and simplify segments with fewer changes in direction.
• Whenever a TracBack route is activated, the receiver will automatically
erase any temporary waypoints (e.g., ‘T001’) that are not contained in
routes 1-20. If there are temporary waypoints stored in routes 1-20, the
receiver will create any new temporary waypoints using the first three
digit number available.
A. The TracBack
feature uses your
track log to create a
route back to where
you started.
52
B. Once a TracBack is
activated, the track
log is divided into
segments using
temporary
waypoints, and an inverted route is activated back to the oldest track log point in
memory.
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ROUTES
Creating a Route On Map
8
The last way to navigate to a destination is to create a user-defined route.
The GARMIN GPSMAP 175 lets you create and store up to 20 reversible
routes (numbered 1-20), with up to 30 waypoints each. Routes can be created
and modified right from the map page, allowing you to see each route
graphically on-screen as you create, review, modify or navigate the route. All
of the GPSMAP 175’s route functions are accessed through the main menu.
To create a route on the map:
1. Press the O key twice to display the main menu page.
2. Highlight the ‘Routes’ field and press T. The routes page will appear,
showing all the routes currently stored in memory.
3. Press the O key to display the route options page.
4. Press T to select the ‘Create New Route’ option.
The route edit page will appear, with the cursor displayed as an arrow pointer,
and will allow you to select your route waypoints using one of two methods:
5. To add an existing waypoint or navaid to the route, use the arrow pointer
to highlight the desired waypoint on screen and press T.
6. To add a new waypoint to the route, use the arrow pointer to select the
desired map position and press T. Press T again to confirm the
new waypoint.
As you add each new waypoint to the route, the data window at the top of
the map display will show the route number you are creating, along with the
first and last route waypoints of the route. A route line will appear on the map
to indicate each completed leg, and a dotted line will appear to indicate the
distance and bearing to the arrow pointer from the last route waypoint.
7. Repeat steps 5 and 6 until you have finished defining all route waypoints.
8. Press Q to finish and enter review mode, or J to return to the main
page sequence.
A. The route options
page provides access
to the GPSMAP
175’s route
functions.
B. Use the arrow
pointer and
EDIT/ENTER to
add waypoints to
the route. The
create waypoint page will appear whenever you have selected a position that is
not already stored as a waypoint.
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Reviewing & Editing Routes On Map
Once a route has been created on the map (and the Q key has been pressed
to finish), the map display will automatically enter the route review mode. The
arrow pointer will be replaced by the map cursor, located at the last route
waypoint. The route edit mode allows you to review and modify the route
displayed through a pop-up window menu for each waypoint. You may also use
the cursor to select an individual route leg and insert a new route waypoint.
To edit a route waypoint:
1. Use the cursor to highlight the desired route waypoint and press T.
A pop-up menu of editing choices will appear, with options for reviewing,
removing, moving or inserting a route waypoint.
To review a route waypoint:
1. Highlight the ‘Review?’ option and press T.
To remove a route waypoint:
1. Highlight the ‘Remove?’ option and press T.
To move a route waypoint:
1. Highlight the ‘Move?’ option and press T.
2. Move the cursor to the new map position and press T.
To insert new route waypoint(s) at the beginning or end of the route:
1. Select the first (to add waypoints to the beginning of the route) or last (to
add waypoints to the end of the route) route waypoint with the map
cursor, and press T.
2. Highlight the ‘Insert?’ option and press T.
3. Move the cursor to the new waypoint position and press T.
4. If you are not inserting an existing waypoint, press T to confirm the new
waypoint.
5. Repeat steps 3 and 4 to insert additional waypoints, or press Q to finish.
A. To move a route
waypoint, select the
‘Move?’ option and
press EDIT/ENTER.
B. Move the arrow
cursor to the new
waypoint position
and press
EDIT/ENTER to
confirm.
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ROUTES
Route Edit Mode
8
The GPSMAP 175’s route edit mode also allows you to insert a new route
waypoint in any route leg using the map cursor.
To insert a new waypoint between two existing route waypoints:
1. Use the cursor to select the leg in which to insert the new waypoint (the
route line will change to a dotted line when the leg is selected) and press
T.
2. Move the cursor to the new map position and press T.
3. If you are not inserting an existing waypoint, press T to confirm the new
waypoint.
The route edit options page provides access to a variety of functions which
can be used to review, activate, invert or edit the route as text and adjust the
map view of the selected route.
To display the route edit options:
1. Press O.
To select a menu option:
1. Highlight the desired option and press T.
The following options are available:
• Edit As Text?— allows you to modify a route by text entry.
To edit a route by text entry:
1. Highlight the ‘Edit As Text?’ option and press T. The text edit page will
appear, showing a list of all route waypoints, with the desired track and
distance of each leg displayed.
2. Select the route waypoint you want to review or change and press T.
A pop-up menu with four route editing options will appear.
To review the selected waypoint:
1. Highlight the ‘Review?’ option and press T.
A. Insert a new route
waypoint into any
route by pointing to
the new waypoint or
position and pressing
EDIT/ENTER.
B. The ‘Edit As Text?’
option allows you to
review and modify
waypoints by text
data entry.
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ROUTES
Editing Routes & Route Editing Options
To insert a new waypoint before the selected route waypoint:
1. Highlight the ‘Insert?’ option and press T.
2. Enter the name of the new waypoint using the R keypad, or press O to
select the new waypoint from the nearest list, waypoint list, or map display.
3. Press T to finish.
To remove the selected route waypoint:
1. Highlight the ‘Remove?’ option and press T.
To change the selected route waypoint:
1. Highlight the ‘Change?’ option and press T.
2. Enter the name of the new waypoint using the R keypad, or press O to
select the new waypoint from the nearest list, waypoint list, or map display.
3. Press T to finish.
The route edit options page features five more functions. These functions
may be selected by highlighting the desired function and pressing T:
• Activate Route?— activates the route you are editing and begins navigation.
• Invert Route?— activates the route you are editing in reverse order and
begins navigation.
• Center On Vessel?— redraws route edit map with your vessel in the
center of the display.
• Center On First Wpt?— redraws route edit map with the first route
waypoint in the center of the display.
• Deactivate Route?— stops navigation of the route currently selected.
To exit the route edit mode and return to the route list page, press the Q key.
A. To remove a route
waypoint, highlight
the waypoint, press
EDIT/ENTER, and
select the remove
option from the popup window.
56
B. The route edit
options page lets
you activate, invert
or deactivate the route you are editing. The ‘Center On Vessel’ and ‘Center On
First Wpt’ options redraw the map to display the desired option.
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ROUTES
Route List Page
8
The GPSMAP 175’s route list page displays all the routes currently stored
in memory in numerical order, with the route number and comment
displayed. Route 00 is always reserved for the TracBack route, while routes 120 serve as storage routes. (Route 20 is stored as the GPSMAP tour route,
which may be deleted at any time.) From the list, you may enter your own 16character route comment and select a specific route for activation, editing or
other management functions.
To enter a custom route comment:
1. Highlight the desired route and press T.
2. Press the left arrow key of the R keypad to clear the comment field.
3. Use the R keypad to enter the new route comment and press T.
Once you have selected a route from the route page, additional functions
for that route are available from the route options page.
To display the route options:
1. Press O.
To select a menu option:
1. Highlight the desired option and press T.
The following options are available from the route list page:
• Create New Route?— allows you to create a new route. (See page 53.)
• Activate Route?— activates the selected route and begins navigation.
• Invert Route?— activates the selected route in reverse order and
begins navigation.
• Edit On Map?— allows you to edit the selected route on the map.
(See pages 54-55 for specific instructions.)
• Edit As Text?— allows you to edit the selected route by text.
(See pages 55-56 for specific instructions.)
A. The route list page
displays each route
stored in memory,
along with a 16character user
comment. The
default comment is
the name
of the first and last
route waypoint.
B. The route list options page provides quick access to many route functions,
including activating and deactivating a selected route.
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Route List Options
• Clear Route?— allows you to clear all waypoints from the selected route.
To clear the selected route:
1. Highlight the ‘Clear Route?’ option and press T.
2. Press T to confirm the clear route warning.
• Copy Route?— allows you to copy the waypoints of a selected route to
another route. The route copy function can be used to copy a TracBack
route (route 00) to another route in order to either prevent losing the
route the next time a TracBack route is activated, or save a modified
version of an existing route without losing the original.
To copy a route:
1. Highlight the ‘Copy Route?’ option and press T. The selected route will
appear as the ‘copy from’ route, and the first open storage route will
appear as the ‘copy to’ route.
2. Press T to confirm. (If you’d like to change the route number that is being
copied or the open route which is being copied to, highlight the appropriate
field and press T; select the new route number and press T.)
• Deactivate Route?— stops navigation of the route you are
currently navigating.
A. To delete all
waypoints from a
selected route,
highlight the ‘Clear
Route?’ option and
press EDIT/ENTER.
B. Once a route is
cleared, all
waypoints are
removed from the
route. They are still stored in memory, however.
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Active Route Page
8
Whenever you have activated a route in the GPSMAP 175 system, the
active route page will appear in the main page sequence. The active route
page shows each waypoint of the active route, with the waypoint name, desired
track, cumulative distance and ETE or ETA for each waypoint from your
present position. The current destination waypoint, the ‘active to’ waypoint, is
marked with an arrow icon. As you navigate a route, the waypoint list will
automatically update to indicate the next ‘active to’ waypoint first.
From the active route page, you can:
• Change the route comment- see page 57 for instructions.
• Edit the route on map- see pages 54-55 for instructions.
Additional functions for the active route are available from the active route
options page.
To display the active route options:
1. Press O.
To select a menu option:
1. Highlight the desired option and press T.
Each waypoint on the active route
page may be reviewed, deleted or
changed right from the active route
page. To edit an active route
waypoint, highlight the desired
waypoint and press EDIT/ENTER.
Select the desired function from the
pop-up menu and press
EDIT/ENTER.
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Active Route/Page Options
The following options are available from the active route page:
• Invert Route?— activates the active route in reverse order and
begins navigation.
• Activate Route?— reactivates the active route and selects the route
leg closest to your current position as the new active leg.
• Edit On Map?— allows you to edit the selected route graphically.
(See pages 53-54 for specific instructions.)
• Clear Route?— allows you to clear all waypoints from the
selected route.
• Copy Route?— allows you to copy the waypoints of the active route
to another route.
• Change Data Fields?— allows you to define the data displayed in
the distance and ETE fields. Four data options are available:
• DIS– distance to active wpt
• DTK– desired track
• ETE– estimated time enroute • ETA– estimated time of arrival
• Restore Defaults?— resets all active route page options to the
factory settings.
• Deactivate Route?— stops navigation of the route you are
currently navigating.
• Setup Simulator?— allows you to define speed, course and
position values while in simulator mode. See the Getting Started Tour
for more on using the simulator mode.
The ‘Change Data Fields?’ option
lets you specify what information
is displayed for each route
waypoint. Four data options are
available: distance, desired track,
and ETA or ETE to each route
waypoint.
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SETUP MENUS
Track Log Setup
9
The GPSMAP 175’s main menu page’s track submenu lets you specify
whether or not to record a track plot (an electronic recording of your path)
and define how it is recorded. It also provides an indicator of the track
memory used and selects functions to clear the track memory and start a
TracBack route. The following functions are available:
• Record Mode— lets you select one of three track recording options:
• Off– No track log will be recorded. Note that selecting the ‘Off’ setting
will prevent you from using the TracBack feature.
• Fill– a track log will be recorded until the track memory is full.
• Wrap– A track log will be continuously recorded, wrapping through the
available memory (replacing the oldest track data with new data).
• Interval— defines the frequency with which the track plot is recorded.
Three interval settings are available:
• Time– records track plot based on a user-defined time interval.
• Resolution– records track plot based upon a user-defined variance
from your course over ground. The resolution option is the default
setting and is recommended for the most efficient use of memory and
TracBack performance. The distance value (entered in the interval
field) is the maximum error allowed from the true course before
recording a track point.
• Distance– records track based on a user-defined distance between points.
• Interval Value— defines the distance or time used to record the track log.
• Delete Track?— allows you to clear the track log currently stored in memory.
• Start TracBack?— converts the current track log into an inverted route
and begins route navigation along the track log.
To reset all track options to the default settings:
1. Press O, followed by T.
A. The ‘Wrap’ option
will continuously
record a track log,
and replace the
oldest track log
point with new
data. The ‘Fill’
option will record a
track log until the
memory is full.
B. The track submenu’s default settings may be quickly restored from the track
options page.
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SETUP MENUS
Trip & Fuel Planning
The GPSMAP 175’s trip and fuel planning submenu lets you plan and
review distance, fuel, and ETE/ETA information between any two waypoints;
your present position and a stored waypoint; or any part of a stored route.
Sunrise and sunset information is also provided. Two planning modes are
available: point-to-point and route planning.
To use the point-to-point planning mode:
1. Highlight the ‘Trip & Fuel Planning’ option from the main menu page and
press T.
2. If the plan field is not set to ‘Point-To-Point’, press the O key and select
it from the options page.
3. Highlight the first waypoint field and press T. Press the left arrow key
to clear the field, and use the R keypad to enter the name of the starting
waypoint. You may leave the waypoint field blank to use your present
position, or press the O key to select the waypoint from the nearest list,
the waypoint list, or the map display. Press T to confirm the waypoint.
4. Move the field highlight to the second waypoint field and follow the steps
above to select the destination waypoint.
5. Enter a speed for your trip in the speed field, or press O to select your
current SOG for the speed value.
6. Enter an hourly fuel flow (if desired) in the fuel field, and press T.
7. Enter the date and time of your departure (the default date and time will
be the current date and time in UTC or local time, whichever you have
selected) and press T.
The bottom of the page will now display the desired track and distance
between the two points; the estimated time enroute and fuel required; the date
and time of your arrival; and the sunrise and sunset times at the destination
for the date of arrival.
A. To perform pointto-point planning,
enter a ‘TO’ and
‘FROM’ waypoint,
or leave the field
blank if you want to
use your present
position.
62
B. Enter a date and
time for your
departure. The sunrise/sunset and ETA at the ‘TO’ waypoint will be displayed at
the bottom of the page.
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SETUP MENUS
Route & Trip Planning
9
The route planning mode lets you calculate the same planning information
for any route stored in memory, in leg or cumulative leg or route totals.
To use the route planning mode:
1. Highlight the ‘Trip & Fuel Planning’ option from the main menu and press T.
2. If the plan field is not set to ‘Route’, press O and select it from the
options page.
3. Highlight the route number field and press T.
4. Use the R keypad to select the route you want to plan and press T.
5. The leg field will be highlighted. Press T.
6. To plan cumulative totals for the all route legs, select the ‘ALL’ option—or
use the R keypad to select a specific route leg to plan. Press T to
confirm.
7. Enter a speed for your trip, or press O to select your current SOG for the
speed value.
8. Enter an hourly fuel flow (if desired) in the fuel field, and press T.
9. Enter the date and time of your departure (the default date and time will
be the current date and time in UTC or local time, whichever you have
selected) and press T.
The bottom of the page will now display the planning information for the
route leg selected or the cumulative values for the entire route. The route
planning mode will also let you plan cumulative totals for multiple route legs
by using the ‘Hold First Waypoint?’ selection from the options window.
To plan multiple route legs:
1. Follow steps 1-6 above to select the last route leg you want to plan. For
example, select leg 03 if you want to plan cumulative totals for the first
three legs of the route (without including the rest of the route).
2. Enter the speed, fuel and date/time values as described in steps 7-9 above.
3. Press the O key to display the options page.
4. Select the ‘Hold First Waypoint?’ option and press T. The cumulative
totals from the first route waypoint to the end of the selective leg will
appear at the bottom of the page.
A. To plan cumulative
totals for an entire
route, select the ‘All’
option from the leg
field.
B. To plan cumulative
totals through a
particular leg, select
the ‘Hold First
Waypoint?’ option
from the Trip and Fuel Planning options page. Then enter the last leg you want
to plan in the leg field.
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SETUP MENUS
Sunrise/Sunset Planning and System Setup
The fuel and trip planning submenu also allows you to calculate the sunrise
and sunset times for your present position or any waypoint for a selected date.
To use the sunrise/sunset planner:
1. Highlight ‘Trip & Fuel Planning’ option from the main menu and press T.
2. Highlight the first waypoint field and press T. Press the left arrow key
to clear the field, and use the R keypad to enter the name of the desired
waypoint. You may leave the waypoint field blank to use your present
position, or press the O key to select the waypoint from the nearest list,
the waypoint list, or the map display. To calculate the sunrise/sunset for
your present position, leave both waypoint fields blank.
3. Press T to confirm.
4. Highlight the date field and press T.
5. Enter the date you want sunrise/sunset information for (current date and year
will be used as the default setting) and press T. The sunrise and sunset
times for arrival date will be displayed at bottom right of the planning page.
Setup Submenus
The last four options available from the main menu page provide access to
the various system, navigation, alarm and interface settings of the GPSMAP
175. The system setup submenu is used to select the operating mode, date
and time formats, tone preferences, backlight timeout and display contrast.
• Operational Mode lets you select between normal operation and
simulator mode. The GPSMAP 175’s system only pretends to track
satellites in simulator mode, and should not be used for actual
navigation. Waypoints and routes created in simulator mode are saved in
memory and are available for use in normal mode.
• Time Offset provides a data entry field to enter the time difference
between UTC time and the local time. (See Appendix E for a list of time
offsets.) When entering a time offset, be sure to select a positive or negative
offset. Note that entering an offset will not automatically display local time.
The local setting from the Date/Time Selection submenu must be selected.
A. The system setup
submenu provides
access to the
GPSMAP 175’s time
formats and
contrast/backlight
controls.
B. When entering a
time offset, be sure
to select a positive
or negative indicator to the left of the offset value.
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SETUP MENUS
System Setup and System Setup Options
9
• Local/UTC lets you choose to display the date and time in UTC
(Greenwich Mean Time) time or local time offset from UTC time. The
default setting is local with a ‘0’ offset. (If you are boating in the United
States, be sure to enter a negative time indicator in front of the
appropriate time offset for your location.)
• Tone Selection lets you select an audible tone to sound for either
messages and keystroke confirmation (the default setting), messages
only, or not to sound at all. (The tone selection does not affect the
external alarm operation.)
• Display Contrast provides a slide bar to adjust the LCD screen contrast
in order to compensate for changes in temperature or lighting conditions.
• Backlight Timeout provides an automatic shutoff for the GPSMAP
175’s screen backlighting. Six settings are available: No Timeout (the
backlight will stay on until it is turned off), 15 seconds (default
setting); 30 seconds; and 1, 2, or 4 minutes. Keeping the timeout at
the lowest acceptable setting will prolong the life of the backlight.
The system setup page also features an options page that allows you to
quickly reset all the system setup options to the factory default settings and
define speed, course and position values while in simulator mode (see Getting
Started Tour).
To view the system setup page options:
1. Press the O key.
To restore the default settings:
1. Highlight the ‘Restore Defaults?’ option, and press T.
A. The tone preference
will not affect
external alarm
operation.
B. Keeping the
backlight timeout at
the lowest
acceptable setting
will prolong the
useful life of the
backlight.
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SETUP MENUS
Navigation Setup
The navigation setup submenu is used to select a variety of navigation
information including: position format, units of measure, and heading
preferences. This submenu is also used to select map datums, set the CDI
scale and adjust the built-in velocity filter. The following options are available:
• Position Format lets you select the coordinate system used to display
position. The following formats are available:
• hdddºmm.mmm’ (degrees and minutes)
• hddd.dddddº (degrees)
• hdddºmm’ss.s” (deg/min/sec) • British grid
• German grid
• Irish grid
• Maidenhead
• Swedish grid
• Swiss grid
• Taiwan grid
• UTM/UPS grid
• Navigation Units selects the format for speed and distance
measurements. You may select from nautical, statute or metric formats.
(The default setting is nautical.)
• Depth Units selects the format for depth contour display on G-chart
offshore chart cartridges. Depth contours can be displayed in feet,
meters or fathoms. (The default setting is feet.)
• Heading lets you select what reference is used in calculating heading
information. You can select to reference automatic magnetic variation,
true north, grid heading or user magnetic variation. (The default setting
is automatic.)
To enter a user magnetic variation:
1. Highlight the ‘Heading’ field and press T. Select the ‘User Mag Var’
option and press T.
2. Press T to access the variation field, and use the R keypad to enter the
desired variation. Press T to confirm.
A. The GPSMAP 175
will also display
position coordinates
in eight grid
formats.
B. To enter a user
magnetic variation,
select the ‘User Mag
Var’ option and
enter a direction
and value in the variation field.
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SETUP MENUS
Navigation Setup
9
• CDI Scale provides a list of six CDI scale settings for the map page CDI:
+/-0.10, 0.50, 1.0 (default). 5.0, 10.0 and 25.0 miles or kilometers. The
scale represents the distance from the center to either end of the scale.
• CDI Steer To allows you select a steer-to-center or steer-to-D-Bar
orientation for graphic steering guidance. The steer-to-center selection
displays your position as the vertical line on the scale, and your desired
track as the center of the scale. The steer to D-Bar option displays your
position as the center of the scale, with the desired track as the vertical line.
The default setting is steer to center.
• Map Datum provides a list of the available map datums for use with the
GPSMAP 175’s system. For a list of the available GPSMAP datums, see
Appendix F. The default setting is WGS 84.
• Velocity Filter allows you to select the GPSMAP 175’s response time to
changes in track or ground speed. Three settings are available: automatic,
on, or off. The ‘auto’ (default) setting will monitor the changes in your
current track and speed and adjust the receiver’s response time
automatically. The ‘on’ setting allows you to manually enter a response
time up to 240 seconds. Selecting a higher setting may be desirable in
slow-speed applications with frequent changes in track.
To enter a user-defined velocity filter value:
1. Highlight ‘Velocity Filter’ field and press T. Select ‘On’ option and press T.
2. Highlight the time value field.
3. Press T.
4. Enter a value in seconds (up to 240) and press T to confirm.
A. CAUTION!
Ensure the GPS
datum matches
your chart’s
datum, or serious
position errors
may result. If no
datum appears
on your chart,
contact the chart
manufacturer.
B. The ‘Auto’ velocity filter setting will allow the GPSMAP 175 to automatically
monitor and adjust the response time for track and speed calculations.
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SETUP MENUS
Timers & Alarms
The timer & alarms submenu is used to control various alarm/timer settings.
• Timer sounds an alarm when a (count down) time interval (up to
99:59:59) has expired, or provides an elapsed (count up) timer up to
99:59:59.
To use the timers:
1. Select the ‘Count Down’ menu option.
2. Enter the desired time interval in the interval field, and press T.
3. Once the count down time has expired, an alarm message will appear,
and the timer will automatically switch to the count up mode.
4. To reset the timer, select the reset option and press T.
• Clock Alarm provides an alarm for the system clock. To use the clock alarm,
select the ‘On’ option and enter the desired time of day in the time field.
• Arrival Alarm lets you specify an alarm to sound when you’re a specified
distance away from a destination waypoint. Three options are available:
• Off- No arrival alarm will sound.
• Auto- An arrival alarm will sound one minute before the destination,
based upon our current speed and course over ground.
• On- An arrival alarm will sound at the alarm distance specified in the
distance field for the destination waypoint. (The ‘On’ setting will only
provide an arrival alarm for the final destination waypoint of the
active route.)
• Crosstrack Alarm provides an alarm for crosstrack error (XTK) that will
sound when your vessel is off course by more than a specified distance,
up to 99.99 nm.
• Anchor Drag Alarm lets you specify an alarm to sound when you’ve
exceeded a specified drift distance, up to 9999 feet or meters. Whenever
the anchor alarm is triggered, an anchor icon will appear in the status bar.
A. The timer field can
be set to count down
from a specified
interval or provide a
running count of
elapsed time.
B. The ‘On’ setting of
the arrival alarm
will cause the alarm
to sound only for
the final destination waypoint of a route at the distance specified.
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SETUP MENUS
Input/Output Setup
9
The Input/Output submenu lets you control interface settings for
connecting external NMEA devices, a DGPS receiver or a personal computer.
The ‘Input/Output Format’ field, at the top of the page, lets you specify one of
seven interface options:
Data Transfer is a proprietary interface that allows you to exchange data
such as waypoints, routes and track logs between GPSMAP units or a
GARMIN PCmate PC-Kit.
No In/NMEA Out provides navigation information to a compatible NMEA
device such as an autopilot or radar. NMEA 0180, 0182, 0183 v.1.5 and
0183 v.2.0 output options are available. (See Appendix B for additional
NMEA sentence information.)
No In/No Out provides no interfacing capabilities.
RTCM In/NMEA Out allows DGPS beacon receiver input and also
provides selectable NMEA output.
RTCM In/No Out allows DGPS beacon receiver input, with no output
capabilities.
NMEA In/No Out allows input from a NMEA compatible external device,
such as a Yeoman© Plotter, with no output capabilities.
NMEA In/NMEA Out provides the same input capabilities as NMEA IN,
with selectable NMEA output.
When the ‘Data Transfer’ option is selected, you’ll need to specify what
information to request or send to the remote unit through the Transfer Mode
field. The ‘slave’ setting lets you control all data transfer from the “external”
GPS receiver, or PC while the other settings request or send specific data from
the primary unit.
A. The data transfer
options allow you to
send or receive
almanac data,
proximity
waypoints, routes,
track log data and
waypoints to
another GARMIN
GPS or PC Kit.
B. The NMEA In setting allows you to accept NMEA data from a Yeoman plotter or
other compatible device.
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Page 70
SETUP MENUS
NMEA & DGPS Setup
If you are using an NMEA interface format, the NMEA format must be
specified in the NMEA format field that will automatically appear when an
NMEA option is selected. The appropriate baud rate will be set automatically.
To select a NMEA format:
1. Select a NMEA IN/OUT format from the options page.
2. Highlight the NMEA Format field and press T.
3. Select a NMEA sentence format and press T.
4. The baud rate will automatically be set to the appropriate speed. If you
have selected an NMEA IN/OUT setting, you must use the same NMEA
format for both the input and output device.
Tuning DGPS Stations
If the I/O Format is set to accept RTCM input/NMEA Output for connecting
a differential-ready GPS beacon receiver, you will need to tune a frequency in
the tuning field and select a bit rate. The default frequency will be 304.0 kHz,
with a bit rate of 100 bps, or the last DGPS frequency/bit rate selected.
To tune a DGPS frequency:
1. Select the ‘RTCM In/NMEA Out’ format from the options page.
2. Highlight the beacon receiver frequency field and press T.
3. Enter the desired frequency and press T. If you are using an
automatically-tuned DGPS receiver, you may enter 000.0 for
the frequency.
4. Press T to select a bit rate. Five bit rates are available: 0 (used for
automatically-tuned DGPS receivers), 25, 50, 100 and 200 bps. Press T to
confirm. The DGPS status, along with the signal-to-noise ratio of the tuned
station, will be displayed at the bottom of the page.
A. Select the desired
format from the
NMEA field. The
baud rate will
automatically be set
to the appropriate
speed.
70
B. After entering a
DGPS frequency, set
the bit rate to the
speed indicated on the USCG station chart. DGPS coverage, frequencies, and bit
rates are available from the Coast Guard.
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G-CHARTS
Installing & Removing G-charts
10
The GARMIN GPSMAP 175 system uses G-chart offshore or inland
cartography to display digital charts on-screen. G-chart cartridges are inserted
in the card slot located on the right side of the unit, and may be installed or
removed at any time, whether the unit is on or off.
To install a G-chart cartridge:
1. Open the cartridge door.
2. Insert the card into the slot. (Label should face up and toward the unit.)
3. Use your thumb to firmly push the cartridge into place (until the cartridge
will not go any further into the unit). If your GPSMAP 175 is on, a
confirmation tone will sound when the cartridge has been properly
installed and accepted.
4. Close the door.
#
!
If you insert a G-chart cartridge and get a ‘card format not recognized’
message, try removing the card and reinserting it. If the card is still not
recognized, contact the dealer you purchased it from for assistance. Gchart cartridges are not waterproof, should not be exposed to moisture
or excessive static charges, and should be stored in the anti-static bag
supplied with the cartridge.
To remove a G-chart cartridge:
1. Open the cartridge door.
2. Using the “data card extractor” supplied with the unit, grasp the card at
the bottom groove and pull outward.
3. If your unit is on, a confirmation tone will sound as the G-chart cartridge
is removed.
4. Close the door.
A. Installing a G-Chart
cartridge.
B. Removing a GChart cartridge.
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Page 72
G-CHARTS
Using G-chart Cartography
Once a G-chart cartridge has been inserted, the map coverage outlines for
the cartridge will automatically appear on-screen. Keep in mind that the
display will not automatically scroll to the map area or zoom to a level where
you can see the coverage outlines. If you do not immediately see the outlines,
scroll the cursor to the broad geographic area covered by the chart and zoom
out to another map scale.
The large outlined box shown is the main chart, which serves as the
boundary area for the entire cartridge. The small outlined box inside the main
box are subcharts, which provide more detailed coverage of the area
indicated. To view the detailed cartography of any subchart, scroll the cursor
to the subchart outline and use the Z key to zoom in to smaller range scales.
If the map outlines still do not appear, check the ‘Map Outlines’ setting on the
map options page to make sure they are set to appear (see page 32).
#
!
Whenever you zoom past the usable range of the current electronic chart, the range
field will display ‘Ovr Zm’ or ‘No Map’. These warnings indicate that although you
may still have cartography, you should exercise extreme caution using the data. See
page 31 for more information on Overzoom and No Map modes.
When a G-chart cartridge is installed, the GPSMAP 175’s system will
automatically use the best available chart for display. As you enter and exit various
subcharts, the system will automatically display the appropriate chart for the area
you are in. When you leave the area covered by the main map of a cartridge, the
GPSMAP 175 will default back to using the built-in 64 nm database.
If you are not seeing certain map items (navaids, depth contours, etc. on
offshore cartridges; highways, boat ramps, etc. on inland cartridges), check
the map configuration settings available from the map options page.
A. Map outlines for
G-chart offshore
cartography.
B. Map outlines for
G-chart inland
cartography.
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Page 73
APPENDIX
Power Installation
A
Your unit uses 6 AA batteries that provide up to 10 hours of battery life. An
optional rechargeable Ni-Cad battery pack and charger are also available. In
addition, the GPSMAP 175 may be hard-wired to 5-40 volt DC power using
the power/data cable or cigarette lighter adapter.
To remove and install a battery pack:
1. Push down on the spring tab on the bottom of the battery pack.
2. Slide the battery pack off from underneath the unit
S
ES
PR
To install alkaline
batteries:
1. Depress the plastic
tab at the top of the
pack and pull the lid
of the pack off.
2. Replace the
batteries, observing
the polarity diagram
engraved in the lid.
3. Match the two tabs on the lid with the slots in the base of the pack. The
lid will snap into place.
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A
Page 74
APPENDIX
Installation
The GPSMAP 175 displays battery strength in two ways: The first is a
battery gauge located below the DOP measurement on the status page. The
second is a battery icon located on the status bar. Both methods display
continuous battery level updates and are shown only when the unit is being
powered by battery power (not external power). The battery icon is shown on
every page to ensure that you are aware of battery strength at all times.
Battery Gauge
#
!
Battery Icon
The battery level indicators are calibrated for alkaline batteries, although
levels of both alkaline and Ni-Cad batteries can be determined on both
indicators. No other receiver functions are affected by using Ni-Cad or alkaline
batteries.
Because some battery drain occurs even if the unit if off, separate the
battery pack from the unit when storing for extended periods of time. A
built-in rechargeable lithium battery will save almanac and waypoint data
when the battery pack is not attached, but it will only save data for a few
months. Note: the lithium battery is not rechargeable and must be replaced
when depleted.
•Do not short battery pack terminals
Shorting the terminals that power your GPSMAP 175 can cause sparks, severe
overheating, burns, and battery cell damage. If the short lasts long enough, it is possible to
melt battery components. Each battery pack has two exposed terminals. For this reason,
don’t place a loose battery pack on or near metal objects (paper clips, keys, tools, etc.)
and be careful when placing battery packs in handbags, toolboxes, etc. Never immerse a
battery pack in water. If the battery pack becomes wet, wipe it dry before attaching it to
the unit.
When the battery pack is installed on the unit, the terminals that transfer current to it
are not exposed. The terminals that are exposed on the battery pack when it is mounted
on the unit are charging terminals only and do not constitute a hazard.
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APPENDIX
Installation
A
Ni-Cad Battery Pack and Charger
An optional Ni-Cad battery pack and charger are available to power your
GPSMAP 175. Each battery pack contains nickel-cadmium (Ni-Cad)
batteries, which store a charge powerful enough to be dangerous if misused
or abused, especially when removed from the unit.
To recharge the Ni-Cad battery pack:
1. Attach the connector end to the unit by sliding it into the slot on the right
side of the unit. (Observe the keyway on the unit and the matching groove
on the connector end.)
2. Plug the other end into an electrical outlet.
#
!
Do not charge your GPSMAP 175 for more than 24 hours with the battery
charger system. Heat generated by overcharging can shorten battery life and
cause battery pack component failures.
•Please Recycle or Dispose of Properly
Do not dispose of a Ni-Cad battery pack in a fire or incinerator. Heat may cause
battery cells to explode and/or release dangerous gases. All batteries must be recycled or
disposed of properly. They cannot be disposed of by ordinary waste disposal methods. Please
take the time to check with an authorized GARMIN service center, or call 1-800-8BATTER, for recycling options in your area.
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Page 76
APPENDIX
Wiring & Specifications
For maximum battery performance, be sure to drain your Ni-Cad pack as
completely as possible before recharging in order to ensure longer life. If your
battery pack seems to have no capacity even after being charged, completely
discharge it by leaving the power on overnight. Then fully charge the battery
pack again. If the battery pack still does not retain a charge, it will be necessary
to purchase a new battery pack. There is no hazard associated with powering
up your GPSMAP 175 and charging the battery pack at the same time.
DC Wiring
The GPSMAP 175 may be hard-wired to your boat’s 6-40v DC system
using an optional power/data cable (part no. 320-00054-00). Consult the
wiring diagram below for proper connections. The connector end of the cable
attaches to the back of the unit using either the long brass thumb screws
supplied or standard M3 x .5 (6mm) machine screws. The connector end may
also be attached to the mounting bracket for convenient attachment to ship’s
power
PIN 1 (Black):Negative
PIN 3 NC
PIN 5 (Brown):Data In
PIN 7 NC
PIN 9 (Orange):NC
PIN 11 (Pink):NC
PIN 13 (Green):NC
PIN 2 (Red):Positive
PIN 4 (Blue):Data Out
PIN 6 (Yellow):Alarm
PIN 8 (White):NC
PIN 10 (Purple):NC
PIN 12 (Gray):NC
To attach the unit to the adapter:
1. Place the connector end over the contact pad located on the bottom
of the unit, making sure the connector end is facing the correct way
in order to match the terminals.
2. Match the two small screw holes, and secure the adapter using
either the long thumb screws supplied or standard M3 x .5 (6mm)
machine screws. To use this adapter with the mounting bracket,
insert the adapter connector through the slot in the bracket.
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APPENDIX
Wiring and Specifications
B
The following formats are supported for connection to up to 3 NMEA devices:
• NMEA 0180/NMEA 0182
• NMEA 0183 version 1.5
Approved sentences — GPBWC, GPGLL, GPRMB, GPRMC,
GPXTE, GPVTG, GPWPL, GPBOD
Proprietary sentences — PGRMM, PGRMZ (alt.), PSLIB
(beacon receiver control input)
• NMEA 0183 version 2.0
Approved sentences — GPGGA, GPGSA, GPGSV, GPRMB,
GPRMC, GPRTE, GPWPL, GPBOD
Proprietary sentences — PGRME (estimated error), PGRMM
(map datum)
PGRMZ (altitude), PSLIB
(beacon receiver control input)
DGPS
DGPS corrections are accepted in RTCM-104 v. 2.0 format through the
NMEA In (BROWN) harness lead. The GARMIN GBR 21 is the
recommended beacon receiver for use with the GPSMAP system. Other
receivers with the correct RTCM format may be used, but may not correctly
display status or allow tuning control from the GPSMAP 175 unit.
IN
RM
GA R 21
GB
The optional GARMIN GA 27 low-profile remotemount antenna is designed to be used with several
different GARMIN GPS units. To use this antenna with
the GPSMAP 175, simply plug the right-angle “MCX”
male connector on the end of the GA 27 cable into the
socket on the left side of the top of the unit.
Note: The GPSMAP 175 senses the electrical current
used by the GA27 in order to accept antenna input.
Antennas which do not use electrical input (such as the
GPS 45XL helix) will not function properly with the
GPSMAP 175.
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Page 78
APPENDIX
Wiring and Specifications
Using the Mounting Bracket
The GPSMAP 175 can be used as either a handheld or fixed-mount
receiver. An optional mounting bracket (part no. 010-00120-00) is available
for swivel-mount installation on a pedestal or surface-mount installation on a
vertical surface (i.e., boat bulkhead).
To swivel mount the GPSMAP 175:
1. Place the swivel mount in the desired location.
2. Mark and drill three mounting holes, and screw the base down (screws
not included).
3. Insert the round peg on the bottom of the mounting bracket into the top
of the swivel mount. Tighten the screw on the swivel mount to minimize
movement caused by vibration, etc. You may adjust the angle of the unit
up or down by loosening the allen screw at the base of the bracket.
To flush mount the GPSMAP 175:
1. Place the mounting bracket in the desired location.
2. Mark and drill the four mounting holes for the fastener you are using.
3. Fasten the bracket to the surface using the appropriate fastener.
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APPENDIX
B
Wiring and Specifications
To fasten the unit into the mounting bracket:
1. Make sure the two pieces of the bracket are pushing together, and that
the locking bolt on the right side of the bracket is tightened.
2. Slide the unit into the bracket, right side first, so that the two slots on the
right side of the unit match up with the tabs on the right half of the
bracket. The unit should click firmly into place.
GPSMAP 175 Specifications
PHYSICAL
Case: Fully-gasketed
Size: 7.6”H x 2.9”W x 2.1”D
(19.3 x 7.4 x 5.3 cm)
Weight: 1.4 lbs. (635g)
Temperature Range: 5º to 158ºF
(-15º to 70ºC)
PERFORMANCE
Receiver:
Differential-ready,
12-channel
PhaseTrac12
Acquisition Time: Approx. 15 seconds
(warm start)
Approx. 45 seconds
(cold start)
Approx. 5 minutes
(AutoLocate)
Approx. 5 minutes
(Search the sky)
#
!
Update Rate:
1/second,
continuous
Position Accuracy: 1-5 meters (3-16 ft.)*
15 meters
(49 ft.) RMS**
Velocity Accuracy: 0.1 knot RMS
steady state
Dynamics: Performs to specification to 6g
POWER
Range: 6-40v DC
Usage: 1.5 watts max.
Specifications subject to change
without notice.
* With optional GARMIN GBR 21
Beacon Receiver Input.
** Subject to accuracy degradation to
100m 2DRMS under the U.S.
DOD-imposed Selective Availability
Program.
WARNING!
The temperature range for the GPSMAP 175 is -4 to +158ºF (-20 to 70ºC).
Extended exposure to temperatures exceeding this range (in storage or
operating conditions) may cause failure of the LCD screen. This type of failure
and related consequences is not covered by the manufacturer’s limited
warranty.
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Page 80
APPENDIX
Messages
Alarm Clock—The alarm clock has sounded.
Anchor Drag Alarm—You have drifted out of the specified distance range.
Approaching—You are less than one minute away from reaching a destination
waypoint at your present speed over ground.
Arrival At—You have arrived at the destination waypoint.
Can’t Change An Active Waypoint—You have attempted to change the ‘active to’ or
‘active from’ waypoint. Clear the active route or GOTO before making your changes.
Card Format is Not Recognized—The cartridge inserted is not readable by the
GPSMAP system and may be damaged or the card may have been inserted too quickly
to be read. Slowly reinsert the cartridge to make sure it is properly installed. If the
cartridge is still not recognized, call the G-chart information line at 1-800-427-6460.
Crosstrack Alarm—You have exceeded the off-course distance specified in the CDI
setup.
Data Transfer is Complete—The receiver is finished uploading or downloading
information to the connected device.
Database Memory has Failed—The built-in 64 nm database has failed. See an
authorized service center for repair.
Degraded Accuracy—The accuracy of your GPSMAP system has been degraded
beyond 500 meters due to poor satellite geometry or data quality. You should check
other navigational sources to verify the position indicated.
Max Calibration Is 5000mt (16,400 ft)—You have exceeded the maximum
possible map calibration.
Memory Battery Power is Low—The internal battery that stores waypoints, routes
and track plots needs to be replaced. Take your unit to an authorized GARMIN service
center for installation of a new battery.
Need Altitude—Your GPSMAP system needs the altitude to maintain a position fix
due to poor satellite coverage. Enter your approximate altitude on the initialize position
page.
Need to Select Init Method—The GPSMAP 175 needs to be initialized to your present
position. See pages 6-8 for complete instructions on initialization.
No Differential GPS Position—Not enough data is being received to compute a
DGPS position.
Oscillator Needs Adjustment—The GPSMAP 175 has detected excessive drift in its
internal oscillator, which may result in longer acquisition times. Take the unit to an
authorized GARMIN service center for adjustment.
Poor GPS Coverage—The GPSMAP 175 cannot acquire the necessary number of
satellites to compute a position.
Power Down and Re-init—The GPSMAP 175 cannot calculate a position due to
abnormal satellite conditions. Power down and verify the last position shown by other
means.
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APPENDIX
Messages
C
Proximity Alarm—You have entered the alarm radius for the proximity waypoint
indicated.
Proximity List Full—You have used all nine proximity waypoints.
Proximity Overlaps Another Prox Wypt—The alarm radius specified overlaps
the area specified for another proximity waypoint. (See page 47 for more
information on proximity overlaps.)
RAM has Failed—The random access memory has failed and the unit is not
operable. Take your unit to an authorized GARMIN service center for repairs.
ROM has Failed—The unit’s permanent memory has failed and the unit is not
operable. Take your unit to an authorized GARMIN service center for repairs.
Received Invalid Waypoint—A waypoint was received during upload transfer
that has an invalid identifier.
Receiver has Failed—A failure in receiver hardware has been detected. If this
message persists, do not use the unit and take it to an authorized dealer for repair.
Route Already Exists—The route number you are trying to copy to is already
used.
Route Does Not Exist—The route number you are trying to use or copy is not
defined.
Route is Full—You have attempted to add more than 30 waypoints to a route.
Route Memory is Full—You have attempted to create more than 20 routes.
Route Waypoint was Deleted—A route waypoint entered does not exist in the
database and has been deleted from the route.
RTCM Input has Failed—DGPS data being received has been lost. You are no
longer receiving the beacon signal.
Searching the Sky—The GPSMAP 175 is searching the sky for almanac data.
Stored Data was Lost—All waypoints, routes and almanac data has been lost
due to internal battery failure.
There is No RTCM Input—The beacon receiver is not properly connected or
baud rates do not match.
Timer Has Expired—The countdown timer has expired.
Track Memory is Full—The track memory is full and no additional track plot will
be recorded until the track memory has been cleared or set to wrap mode.
Wypt Already Exists—The waypoint name you’ve entered already exists
in memory.
Waypoint Memory is Full—You have used all 250 waypoints in the GPSMAP
130 system.
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Page 82
APPENDIX
Definitions
The GPSMAP 175 uses
an on-screen message
prompt to alert you to
important information.
Whenever a message
appears, press the J
key to view the message.
Almanac Data—The satellite constellation information (including location and health
of satellites) that is transmitted to your receiver from every GPS satellite. Almanac data
must be acquired before GPS navigation can begin.
Bearing (BRG)—The compass direction from your position to a destination.
Course Over Ground (COG)—Direction of movement relative to a ground position.
Crosstrack Error (XTK)—The distance you are off a desired course in either
direction.
Desired Track (DTK)—The compass course between the ‘from’ and ‘to’ waypoints.
Differential GPS (DGPS)—An extension of the GPS system that uses land-based
radio beacons to transmit position corrections to GPS receivers.
Estimated Time of Arrival (ETA)—The time of day of your arrival at a destination.
Estimated Time Enroute (ETE)—The time remaining to your destination at your
present speed.
Grid—A coordinate system that projects the earth on a flat surface, using square zones
for position measurements.
Ground Speed (SOG)—The velocity you are traveling relative to a ground position.
Latitude—A north/south measurement of position perpendicular to the earth’s polar
axis.
Longitude—An east/west measurement of position in relation to the Prime Meridian,
an imaginary circle that passes through the north and south poles.
Position—An exact, unique location based on a geographic coordinate system.
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APPENDIX
E
Definitions & Time Offsets
Turn (TRN)— The difference and direction in degrees between the bearing to your
destination and your course over ground. The TRN value is used to indicate what
direction, and how many degrees, to turn to get back on course.
Universal Time Coordinated (UTC)— The time of day at the prime meridian (0º
longitude) in Greenwich, England.
Universal Transverse Mercator- (UTM)— A grid coordinate system that projects
global sections onto a flat surface to measure position in specific zones.
Velocity Made Good (VMG)—The speed you are traveling in the direction of the
destination.
Waypoint—A specific location saved in the receiver’s memory.
The chart below gives an approximate UTC time offset for the various
longitudinal zones. Check with local charts for more detailed information. If you
are in daylight savings time, add one hour to the offset.
Longitudinal Zone
W180.0º to W172.5º
W172.5º to W157.5º
W157.5º to W142.5º
W142.5º to W127.5º
W127.5º to W112.5º
W112.5º to W097.5º
W097.5º to W082.5º
W082.5º to W067.5º
W067.5º to W052.5º
W052.5º to W037.5º
W037.5º to W022.5º
W022.5º to W007.5º
W007.5º to E007.5º
E007.5º to E022.5º
E022.5º to E037.5º
E037.5º to E052.5º
E052.5º to E067.5º
Offset
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
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Page 84
APPENDIX
Map Datums
The GPSMAP 175’s built-in worldwide database includes chart coverage down to 64
nm (120 km) for the areas outlined above. Note that the GPSMAP 175’s database is
only valid to 68º24.543 north or south.
Adindan
Afgooye
AIN EL ABD ‘70
Anna 1 Ast ‘65
ARC 1750
ARC 1960
Ascnsn Isld ‘58
Astro B4 Sorol
Astro Bcn “E”
Astro Dos 71/4
Astr Stn ‘52
Astrln Geod ‘66
Astrln Geod ‘84
Adindan
Afgooye
AIN EL ABD ‘70
Anna 1 Ast ‘65
ARC 1750
ARC 1960
Ascnsn Isld ‘58
Astro B4 Sorol
Astro Bcn “E”
Astro Dos 71/4
84
Adindan- Ethiopia, Mali, Senegal, Sudan
Afgooye- Somalia
AIN EL ANBD 1970- Bahrain Island, Saudi Arabia
Anna 1 Astro ‘65- Cocos I.
ARC 1750- Botswana, Lesotho, Malawi, Swaziland,
Zaire, Zambia, Zimbabwe
Kenya, Tanzania
Ascension Island ‘58- Ascension Island
Sorol Atoll- Tern Island
Astro Beacon “E”- Iwo Jima
Astro Dos 71/4- St. Helena
Astronomic Stn ‘52- Marcus Island
Australian Geod ‘66- Australia, Tasmania Island
Australian Geod ‘84- Australia, Tasmania Island
Adindan- Ethiopia, Mali, Senegal, Sudan
Afgooye- Somalia
AIN EL ANBD 1970- Bahrain Island, Saudi Arabia
Anna 1 Astro ‘65- Cocos I.
ARC 1750- Botswana, Lesotho, Malawi, Swaziland,
Zaire, Zambia, Zimbabwe
Kenya, Tanzania
Ascension Island ‘58- Ascension Island
Sorol Atoll- Tern Island
Astro Beacon “E”- Iwo Jima
Astro Dos 71/4- St. Helena
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APPENDIX
Map Datums
F
Astr Stn ‘52
Astrln Geod ‘66
Astrln Geod ‘84
Austria
Bellevue (IGN)
Bermuda 1757
Astronomic Stn ‘52- Marcus Island
Australian Geod ‘66- Australia, Tasmania Island
Australian Geod ‘84- Australia, Tasmania Island
Austria
Efate and Erromango Islands
Bermuda 1757- Bermuda Islands
BogataObserv
Bogata Obsrvatry- Colombia
Campo Inchspe
Campo Inchauspe- Argentina
Canton Ast ‘66
Canton Astro 1966- Phoenix Islands
Cape
Cape- South Africa
Cape Canavrl
Cape Canaveral- Florida, Bahama Islands
Carthage
Carthage- Tunisia
CH-1903
CH 1903- Switzerland
Chatham 1971
Chatham 1971- Chatham Island (New Zealand)
Chua Astro
Chua Astro- Paraguay
Corrego Alegr
Corrego Alegre- Brazil
Djakarta
Djakarta (Batavia)- Sumatra Island (Indonesia)
Dos 1968
Dos 1968- Gizo Island (New Georgia Islands)
Easter Isld 67
Easter Island 1967
European 1750
European 1750- Austria, Belgium, Denmark,
Finland, France, Germany, Gibraltar, Greece, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland
European 1979
European 1979- Austria, Finland, Netherlands,
Norway, Spain, Sweden, Switzerland
Finland Hayfrd
Finland Hayford- Finland
Gandajika Base
Gandajika Base- Republic of Maldives
Geod Datm ‘49
Geodetic Datum ‘49- New Zealand
Guam 1963
Guam 1963- Guam Island
Gux 1 Astro
Guadalcanal Island
Hjorsey 1755
Hjorsey 1755- Iceland
85
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F
Page 86
APPENDIX
Map Datums
Hong Kong ‘63
Hong Kong
Hu-Tzu-Shan
Taiwan
Indian Bngldsh
Indian- Bangladesh, India, Nepal
Indian Thailand
Indian- Thailand, Vietnam
Indonesia ‘74
Indonesia ‘74
Ireland 1965
Ireland 1965- Ireland
ISTS 073 Astro
ISTS 073 ASTRO ‘69- Diego Garcia
Johnston Island
Johnston Island Kandawala, Kandawala- Sri Lanka
Kandawala
Sri-Lanka
Kerguelen Islnd
Kerguelen Island
Kertau 1948
West Malaysia, Singapore
L. C. 5 Astro
Cayman Brac Island
Liberia 1964
Liberia 1964- Liberia
Luzon Mindanao
Luzon- Mindanao Island
Luzon Philippine
Luzon- Philippines (excluding Mindanao Isl.)
Mahe 1971
Mahe 1971- Mahe Island
Marco Astro
Marco Astro- Salvage Isl.
Massawa
Massawa- Eritrea (Ethiopia)
Merchich
Merchich- Morocco
Midway Ast ‘61
Midway Astro ‘61- Midway
Minna
Minna- Nigeria
NAD27 Alaska
North American 1927- Alaska
NAD27 Bahamas
North American 1927- Bahamas (excluding San
Salvador Island)
NAD27 Canada
North American 1927- Canada and Newfoundland
NAD27 Canal Zone North Am. 1927- Canal Zone
NAD27 Caribbean
86
North American 1927- Caribbean (Barbados, Caicos
Islands, Cuba, Dom. Rep., Grd. Cayman, Jamaica,
Leeward and Turks Islands)
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APPENDIX
Map Datums
F
NAD27 Central
North American 1927- Central America (Belize,
Costa Rica, El Salvador, Guatemala, Honduras,
Nicaragua)
NAD27 CONUS
North Am. 1927- Mean Value (CONUS)
NAD27 Cuba
North American 1927- Cuba
NAD27 Greenland
North American 1927- Greenland (Hayes Peninsula)
NAD27 Mexico
N. American 1927- Mexico
NAD27 San Salvadr North American 1927- San Salvador Island
NAD83
North American 1983- Alaska, Canada, Central
America, CONUS, Mexico
Nahrwn Masirah llndNahrwn- Masirah Island (Oman)
Nahrwn Saudi Arbia Nahrwn- Saudi Arabia
Nahrwn United Arab Nahrwn- United Arab Emirates
Naparima BWI
Naparima BWI- Trinidad and Tobago
Obsrvtorio ‘66
Observatorio 1966- Corvo and Flores Islands
(Azores)
Old Egyptian
Old Egyptian- Egypt
Old Hawaiian
Old Hawaiian- Mean Value
Oman
Oman- Oman
Ord Srvy Grt Britn
Old Survey Grt Britn- England, Isle of Man, Scotland,
Shetland Isl., Wales
Pico De Las Nieves
Canary Islands
Potsdam
Germany
Pitcairn Astro ‘67
Pitcairn Astro ‘67- Pitcairn
Prov So Amricn ‘56 Prov So Amricn ‘56- Bolivia, Chile,Colombia,
Ecuador, Guyana, Peru, Venezuela
Prov So Chilean ‘63 So Chilean ‘63- S. Chile
Puerto Rico
Puerto Rico & Virgin Isl.
Qatar National
Qatar National- Qatar
87
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F
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APPENDIX
Map Datums
Qornoq
Qornoq- South Greenland
Reunion
Reunion- Mascarene Island
Rome 1940
Rome 1940- Sardinia Isl.
RT 90
Sweden
Santo (Dos)
Santo (Dos)- Espirito Santo
Sao Braz
Sao Braz- Sao Miguel, Santa Maria Islands
Sapper Hill ‘43
Sapper Hill 1943- East Falkland Island
Schwarzeck
Schwarzeck- Namibia
South American ‘69 S. American ‘69- Argentina, Bolivia, Brazil, Chile,
Colombia, Ecuador, Guyana, Paraguay, Peru,
Venezuela, Trin/Tobago
South Asia
South Asia- Singapore
Southeast Base
Southeast Base- Porto Santo and Madiera Islands
Southwest Base
Southwest Base- Faial, Graciosa, Pico, Sao Jorge and
Terceira Islands
Timbalai 1948
Timbalai 1948- Brunei and E. Malaysia (Sarawak and
Sabah)
Tokyo
Tokyo- Japan, Korea, Okinawa
Tristan Astro ‘68
Tristan Astro 1968- Tristan da Cunha
Viti Levu 1916
Viti Levu 1916- Viti Levu/ Fiji Islands
Wake-Eniwetok
Wake-Eniwetok- Marshall
WGS 72
World Geodetic System 72
WGS 84
World Geodetic System 84
Zanderij
Zanderij- Surinam
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APPENDIX
Index
A
Alarm Setup
Anchor Drag Alarm
Antenna Installation
Appendices
Arrival Alarm
AutoLocate
68
68
71
73-81
68
7-8,24
B
Backlight Level
9
Batteries
73-75
Beacon Receiver Setup
70
Bearing
82
Bearing/Distance Calculation
32
Boat Icon
13
Built-in Map Coverage
8,83
C
Calibrations, Map
34
Cancelling Active GOTOs
50
Capabilities
i
Cautions
ii
Clock Alarm
68
Configurations, Map
33
Contrast Setting
9,65
Countdown Timer
68
Course Deviation Indicator (CDI) 19
Crosstrack Error
82
Cursor Mode
29
Cursor Movement
14,30
D
Data Field Entry
Data Window
Date/Time Formats
35
53
65
G
Datum
83-88
DC Wiring
76
Definitions
82
Desired Track (DTK)
82
Depth Contours
66
Depth Units
66
Dilution of Precision (DOP)
24
DGPS Setup
69-70
DGPS Status
24
E
Elapsed Timer
68
Entering Initial Position
6,25
Estimated Position Error (EPE) 24
Estimated Time of Arrival (ETA) 35,82
Estimated Time Enroute (ETE) 35,82
F
Full Page Mapping
Flush Mount
32
78
G
G-chart Cartridges
GOTO Key
Ground Speed
71-72
15,44-45
82
H
Heading Selection
Highway Scales
66
19,37
I
Initialization
Installation
Interface Options
Interface Setup
Interval, Track Storage
6-8
73-75
68
68-69
61
89
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G
APPENDIX
Index
K
Keypad Tone
Keypad Usage
65
4
L
Local Time Offset
65
M
Magnetic Variation
66
Main Menu
39
Man Overboard Function
51
Map Calibration
34
Map Configuration
33-34
Map Datum List
84-88
Map Datum Selection
67
Map Page
28-35
Map Scales
31
Marking a Position
12,40-41
Maximizing Map
32
Measuring Bearing & Distance 32
Menu Selection
21
Message Descriptions
80-81
Message Types
Messages, Viewing
7
Mounting Bracket
78
N
Navigation Page
Navigation Setup
Navigation Units
NMEA Formats
NMEA Setup
No Map Mode
90
Page 90
18-19,36-37
66-67
66
77
69-70
31
O
Offset, local time
Operation Setup
Overzoom Mode
P
Packing List
Page Sequence
Physical Specifications
Point-to-Point Planning
Position Format
Position/Velocity Filters
Power Off
Power On
Proximity Alarm
65,83
64-65
31
i
11
78
62
66
67
22
7
47
R
Removing G-chart Cartridges 71
Routes
53-60
Activating a Route
56
Active Route Page
20,59-60
Clearing
58
Copying
58
Creating
53
Deactivating
55-56
Editing By Text
53-54
Editing On Map
54
Modifying Route Waypoints 55-56
Modifying Routes
54-58
Moving Route Waypoints
54
Removing Route Waypoints 56
Reviewing Routes
54
Route Comments
57
Route Planning Mode
63
Stopping Route Navigation 20
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APPENDIX
Index
S
Satellite Acquisition
5,23-24
Satellite Sky View
23
Signal Strength Bars
8,23
Simulator Mode
10
Simulator Tour
10-22
Specifications
79
Status Bar
24
Status Page
23-25
Steering Guidance
19,36-37
Sunrise/Sunset Calculation
64
Swivel Mount
78
T
Table of Contents
Time Offsets
Timer/Alarm Setup
Tone Selection
TracBack Function
Track Log
Track Memory
Track Plot Resolution
Track Recording
Trip Odometer
Turn (TRN)
U
Units of Measure
UTC time
UTM/UPS Coordinates
G
Modifying
44-45
Moving Route Waypoints
54
Nearest Waypoints
46
Proximity Waypoints
47
Reference Waypoints
43
Removing Route Waypoints 56
Renaming
45
Reviewing
44-45
Submenus
46
1
64,83
68
65
51-52
61
61
61
61
26-27,61
38,82
66
83
83
V
Velocity Filter
67
Velocity Made Good (VMG) 38,82
W
Waypoints
Active Waypoints
Creating
Deleting
Editing By Text
Editing On Map
40-48
59
40-43
45
44
45
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NOTES
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NOTES
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NOTES
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Page 95
LIMITED WARRANTY
GARMIN warrants this product to be free from defects in materials and
workmanship for one year from the date of purchase. GARMIN International,
Inc. will at its sole option, repair or replace any components which fail in
normal use. Such repairs or replacement will be made at no charge to the
customer for parts or labor. The customer is, however, responsible for any
transportation costs. This warranty does not cover failures due to abuse,
misuse, accident or unauthorized alteration or repairs. GARMIN
International, Inc. assumes no responsibility for special, incidental, punitive
or consequential damages, or loss of use.
The warranties and remedies contained herein are exclusive, and in lieu
of all other warranties expressed or implied, including any liability arising
under warranty of merchantability or fitness for a particular purpose, statutory
or otherwise. This warranty gives you specific legal rights, which may vary
from state to state.
To obtain warranty service, call the GARMIN Customer Service
department for a returned merchandise tracking number. The unit should be
securely packaged with the tracking number clearly marked on the outside of
the package, and sent freight prepaid and insured to a GARMIN warranty
service station. A copy of the original sales receipt is required as the proof of
purchase for warranty repairs. GARMIN retains the exclusive right to repair or
replace the unit or software at its sole discretion.
175 Manual
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Page 96
®
© 1996 GARMIN Corporation
1200 E. 151st Street Olathe, Kansas 66062
913/397.8200 FAX 913/397.8282
GARMIN (Europe) LTD Unit 5, The Quadrangle
Abbey Park Industrial Estate, Romsey U.K. SO51 9AQ
44/1794.519944 FAX 44/1794.519222
Part Number 190-00096-00 Rev. A
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