Garmin GPSMAP 175 User Manual

OWNER’S MANUAL AND REFERENCE

GOTO

ZOOM

MOB

MARK

QUIT

PAGE

EDIT

ENTER

GPSMAPTM175

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.

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.

INTRODUCTION

Capabilities/Packing List

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

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

Optional Accessories:

• G-Chart Electronic Chart Cartridges

• External Antenna and 30’ Cable

• Power/Data Cable

• Mounting Bracket

• PCmate PC-Kit

INTRODUCTION

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.

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.

Warning and Caution

WARNING!

CAUTION

GETTING STARTED

Table of Contents

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

GETTING STARTED

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

Appendices

GETTING STARTED

GOTO

ZOOM

MOB

MARK

QUIT

PAGE

EDIT

ENTER

GPSMAP 175 Unit Features

Operating

Keypad

Internal GPS

Antenna

Battery Pack

(in back)

Three-level gray

LCD display

INTRODUCTION

Keypad Usage

Turns the unit on and off and controls 3-level screen backlighting.

Scrolls the main pages in sequence and returns display from a submenu page to a main page.

Captures your present position and displays the mark position window.

Displays the GOTO waypoint window, allowing you to select the destination waypoint. Press GOTO twice to select a destination waypoint graphically from the map.

Displays a context-sensitive options window. Press MENU twice to display main menu page.

Activates highlighted fields and confirms menu options and data entry.

Returns display to a previous page or restores a data field’s previous value.

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.

GETTING STARTED

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.

e You Initialize

Befor

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.

INTRODUCTION

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.

Initialization

GETTING STARTED

Initialization

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.

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

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.

key to zoom in to a lower map scale.

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.

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.

Status Field

GETTING STARTED

Status Page/Simulator Mode

Horizontal Accuracy

Dilution of Precision

Status Bar

Satellite

Sky View

Signal Strength

Indicators

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.

GETTING STARTED

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

Position

Coordinates

Time

of Day

Data

Fields

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.

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.

B. A complete set of waypoint symbols allows you to mark inland and offshore waypoints

with a custom icon for fast waypoint recognition.

GETTING STARTED

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.

Boat Icon

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.

Data

Fields

Map

Scale

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.

GETTING STARTED

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 Zkey 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 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 Qkey 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.

Using the Map Cursor

have

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.

GETTING STARTED

Using the GOTO Key

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.

GETTING STARTED

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.)

Simulator Setup/Map Scales

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.

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.

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

Graphic Highway

Pointer to

Waypoint

Data

Fields

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.

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).

GETTING STARTED

Using the Navigation Page

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

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.

key in either direction (up to increase, down to decrease).

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.

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.

GETTING STARTED

Track Submenu & Clearing the Track Log

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.

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.

Status Field

STATUS PAGE

Overview

Horizontal Accuracy

Dilution of Precision

Battery Gauge

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.

Satellite

Sky View

Signal Strength

Indicators

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.

STATUS PAGE

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 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.

Receiver Status

located on the status bar. Both

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.

B. The status bar will display an anchor symbol or ‘PRX’ icon whenever the anchor

drag alarm or proximity alarm has been triggered.

STATUS PAGE

Options

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.

POSITION PAGE

Compass

Tape

Time

of Day

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.

Overview

Data

Fields

Position

Coordinates

Status Bar

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.

+ 70 hidden pages