Garmin GPSMAP 172 Owner's Manual
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Garmin GPSMAP 172 Owner's Manual

Chartplotting receiver
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  • Page 1 GPSMAP 172/172C chartplotting receiver owner’s manual...
  • Page 2 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. Visit the Garmin Web site (www.garmin.com) for current updates and supplemental information concerning the use and operation of this and other Garmin products.

  • Page 3: Introduction

    Part Two is divided into sections that provide detailed references to the advanced features and opera- tions of the GPSMAP 172/172C. This allows you to concentrate on a specific topic quickly and look up detailed information about the GPSMAP 172/172C.

  • Page 4: Fcc Compliance

    This product does not contain any user-serviceable parts. Repairs should only be made by an authorized Garmin service center. Unauthorized repairs or modifications could result in permanent damage to the equipment, and void your warranty and your authority to operate this device under Part 15 regulations.

  • Page 5: Warnings And Precautions

    For more information go to: www.garmin.com/aboutGarmin/environment/disposal.jsp. MAP DATA INFORMATION: One of the goals of Garmin is to provide customers with the most complete and accurate cartography that is available to us at a reasonable cost. We use a combination of governmental and private data sources, which we identify in product literature and copyright messages displayed to the consumer.
  • Page 6 This Garmin product is warranted to be free from defects in materials or workmanship for one year from the date of purchase. Within this period, Garmin will, at its sole option, repair or replace any components that fail in normal use.

  • Page 7: Capabilities

    Designed for detailed electronic charting capability, the Garmin GPSMAP 172/172C is a powerful navigation device that can give you the information you need: Precision Performance • (172) 10 level grayscale FSTN display with backlighting • (172C) 256-color CSTN display with backlighting •...

  • Page 8: Packing List

    Introduction 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 contact your Garmin dealer immediately. Packing List Standard Package: • GPSMAP 172/172C Unit • GA 29 Remote External Antenna and 30’ cable* •...

  • Page 9: Table Of Contents

    Main Menu Page ..... . .53 GPS Tab......54 Tide Tab .

  • Page 10: How To" Index

    “How To” Index The list to the right is provided to help you quickly find some of the more important procedures you may use on your new GPSMAP 172/172C. v TO DO THIS: Turn the unit on or off ......... . 6 Adjust screen backlighting .

  • Page 11: Section One: Getting Started

    (ZOOM) OUT Key The OUT key adjusts the map scale to display a larger area with less detail. (Zooms out) (ZOOM) IN Key The IN key adjusts the map scale to display a smaller area with more detail. (Zooms in) PAGE Key The PAGE key selects the main pages in sequence and returns display from a submenu page.

  • Page 12: Selecting Options

    Guide contains helpful tips on using the unit and performing various navigation tasks. How To Select Options and Enter Data You can select and activate options and enter data to customize the GPSMAP 172/172C to fit your requirements. You can use the ENTER/MARK key and ARROW KEYPAD to select options, enter names and numbers in data fields, and activate your selections.

  • Page 13: Entering Data

    Naming a waypoint or placing any sort of data that has not been predefined requires the use of both the ARROW KEYPAD and the ENTER/MARK key. To enter a name or number in a data field: 1. Once you have accessed a page with programmable data fields (e.g. ‘ Waypoint Edit’) you can use the ARROW KEYPAD to move the cursor (Highlight) to fields on the page.

  • Page 14: Initializing The Receiver

    Warning Screen Initializing the Receiver The first time you power up your new GPSMAP 172/172C, the receiver must be given an oppor- tunity to collect satellite data and establish its present position. To ensure proper initialization, the GPSMAP 172/172C is shipped from the factory in AutoLocate mode, which allows the receiver to “find itself”...

  • Page 15: Initializing The Receiver

    • Solid signal strength bars— the receiver has collected the necessary data and the satellite(s) are ready for use. Once the receiver has collected information from at least three satellites, the top of the screen displays either “Ready (2D or 3D)”, and the GPSMAP 172/172C is ready for use. Getting Started Initializing the Receiver Point to your approximate loca- tion and press ENTER/MARK.

  • Page 16: Power On/Screen Backlighting

    The GPS Information Page appears as the receiver begins acquiring satellites. From this or any other page, you may also adjust the screen backlighting. The GPSMAP 172/172C’ s adjustable screen backlighting is controlled with the POWER key. The backlight can cycle through minimum, user-defined, and maximum backlight levels by repeatedly pressing the POWER key.

  • Page 17: Simulator Mode

    Each page of the GPSMAP 172/172C’ 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, let’ s put the GPSMAP 172/172C into simulator mode.

  • Page 18: Main Pages

    Main Pages/ Map Page The Map Page is one of six main pages used in the GPSMAP 172/172C’ s system. The six main pages are the Map Page, Map/Sonar Split Page*, Sonar Page* , Compass Page, Highway Page, and Active Route Page.
  • Page 19 Using the Map Cursor Working from the Map Page is a simple process that centers around the use of the cursor. Con- trolled by the ARROW 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 map items and waypoints.

  • Page 20: Waypoints

    Getting Started Marking Waypoints Press ENTER/MARK after entering the name. You can choose from a list of useful symbols. There are two Diver Down waypoint symbols to select from: the International and U.S. versions. To mark your present position: 1. Hold down the ENTER/MARK key until the ‘New Waypoint’ window appears then release the key. The window shows a default three-digit waypoint name/number (001), symbol (dot), and position.

  • Page 21: Using The Nav Key

    For our simulated trip, you’re going to select a pre-programmed tour route using the first method. This also shows how the MENU key is used throughout the GPSMAP 172/172C system to provide tab style options and functions. Let’ s start by changing the position to where the practice route is located.

  • Page 22: Simulated Tour

    Getting Started Simulated Tour You can also Invert a route to follow it in reverse. The Set Position, Track Control, Track and Speed fields only show while in simulator mode. To activate the practice route stored in memory for navigation: 1.

  • Page 23: Reviewing/Creating Map Waypoints

    You’ll now have a clearer picture of the route you are navigating. Keep in mind that whenever you do exceed the usable range of the built-in database or the optional MapSource or BlueChart data in use, the range field displays ‘OVERZOOM’ to indicate that you should exercise extreme caution using the map data.

  • Page 24: Compass Navigation Page

    Arrow Compass Page Now that we’re navigating to an actual destination, let’ s move on to the GPSMAP 172/172C naviga- tion pages by pressing the PAGE key three times. (When using the GPSMAP 172/172C in simulator mode, the optional GSD 20 Map/Sonar Page and Sonar Page are displayed (see page 8) The Compass Page provides graphic steering guidance to a destination waypoint, with an emphasis on the bearing to your destination and current direction of travel.

  • Page 25: Highway Page

    Page as your primary navigation page (in lieu of the Compass Page) when your main concern is following a defined course. Whenever the GPSMAP 172/172C is in simulator mode, you can also adjust your speed and course from the Highway Page using the ARROW 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 Page works.

  • Page 26: Active Route Page

    As you’ve seen, the primary pages provide map and navigation information. The tour’ s last page is the Main Menu page, which allows access to the GPSMAP 172/172C’ s waypoint, route and planning func- tions, as well as various operational and navigation setup features, and celestial and tide data.

  • Page 27: Deleting Waypointst

    2. When the screen is blank, release the POWER key. The next section of the manual describes the pages and functions of the GPSMAP 172/172C in detail. If you are unable to locate a specific option or function, please refer to the Index.

  • Page 28: Section Two: Reference

    • When sufficient map coverage is not available to keep the boat centered, the boat icon moves toward the edge of the display. When the ARROW KEYPAD is pressed, the GPSMAP 172/172C enters cursor mode. In cursor mode: • The cursor can be moved over the map display using the ARROW KEYPAD.
  • Page 29 • Whenever you zoom in cursor mode, the cursor is centered on screen. • To return to position mode, press the QUIT key. When the cursor reaches the edge of the map, the unt may pause as t loads new map data.

  • Page 30: Cursor And Zooming

    The scale value represents the dstance from one end of the scale bar to the other. The GPSMAP 172/172C’ s system has a built-in worldwide database to 20 mi, with more detailed coverage available through the use of the optional BlueChart or MapSource data. The GPSMAP 172/172C displays cartography as long as there is chart information available for the range you’ve...

  • Page 31: Options

    Map Page Options Many features of the GPSMAP 172/172C are menu driven. Each of the main pages have an options menu, allowing you to custom tailor the corresponding page to your preferences and/or select special features that specifically relate to that page. The data window, located at the top of the main pages provides a user-selectable layout of various types of useful data.
  • Page 32 Reference Map Page: Options Cursor Coordinates Distance and Bearing Map Cursor Full screen map shown Main Menu— Map Configuration Tab • Measure Distance— allows you to measure the bearing and distance between any two points on the map display. To measure the Bearing/distance between two points: 1.

  • Page 33: Map Page Options

    General Tab Detail— Most, More, Normal, Less, Least: controls how much map detail displays. Those features which have a specified scale or turned “Off” are unaffected by this setting. Orientation— North Up— fixes the top of the map display to a north heading; Track Up Below—...
  • Page 34 Some types of data only shows up to certain zoom scales. Navaids Tab— Symbol Set— Auto, GARMIN, NOAA, International: controls the desired navaid symbol set. Auto - BlueChart maps are drawn using symbols similar to the NOAA/NIMA standard. Non- BlueChart maps are drawn using traditional Garmin symbols.
  • Page 35 Other Tab— Accuracy Circle— On/Off: toggles the circle “On” and “Off”. The circle represents the approximate accuracy of the unit based on EPE, DOP, and basemap quality. Your position is within the circle. Lat/Lon Grid— Text— None, Small, Medium, and Large: controls the screen size of the name. Zoom—...
  • Page 36 • ETA AT DESTINATION – Estimated Time of Arrival to final waypoint • ETA AT NEXT – Estimated Time of Arrival to next waypoint • GPS ACCURACY – Shows estimated GPS accuracy • HIGHWAY – Smaller version of the Highway Page •...

  • Page 37: Compass Page

    The GPSMAP 172/172C features two different navigation pages: Compass and Highway. Whenever a NAV goto, Follow Track (TracBack), or Follow Route have been activated, the GPSMAP 172/172C’ s Compass Page guides you to your destination with digital readouts and a graphic compass display, which includes a bearing pointer.

  • Page 38: Highway Page

    Highway Page Highway Page Whenever a Go To, TracBack or route has been activated, the GPSMAP 172/172C’ s Highway Page provides digital and graphic steering guidance to the destination with the Navigation Page. The top half of the Highway Page features user-selectable data fields that display useful navigation data. The bottom section of the screen provides visual guidance to the waypoint on a graphic highway display.

  • Page 39: Highway Page Options

    25-26. Active Route Page Whenever you have activated a route in the GPSMAP 172/172C system, the Active Route page shows each waypoint of the active route, along with various, user-selectable types of data. For addi- tional details on the Active Route Page, see page 50.

  • Page 40: Waypoints

    (or cursor or map item position) in order to create a new waypoint. You must have a valid position (2D or 3D) fix to mark your present position. This can be determined by looking at the GPS tab on the Main Menu.

  • Page 41: Creating Waypoints

    When you move the cursor over a map item, you see a highlighted description of that item. The GPSMAP 172/172C uses the map item text shown on the cartography as the default name and symbol for the new waypoint.
  • Page 42 Reference Creating Waypoints Highlight the position field and use the ARROW KEYPAD to enter the desired position coordinates. Select a point from which to project a new waypoint. Additional Options For Creating Waypoints Waypoints may also be created by manually entering position coordinates through the Points tab of the Main Menu.
  • Page 43 3. To select another location from which to project a waypoint, highlight the field next to ‘From’ and press ENTER. The ‘Find’ screen appears. Highlight the desired type of location (waypoints, cities, etc.) and press ENTER. Use the submenus to narrow down your search (for more information see ‘Find’...

  • Page 44: Reviewing

    Reference Reviewing/Editing Waypoints Waypoint Review Page— Highlight ‘OK’ and press ENTER to exit/save changes. Changing a Waypoint symbol. Reviewing and Editing Waypoints Once you have created and stored a waypoint, it may be modified, reviewed, renamed, moved, or deleted at any time through the Waypoint Review and Waypoint Edit pages. To access the Waypoint Review page: 1.
  • Page 45 To change the comment/position coordinates/depth/water temperature: 1. Highlight the desired field and press ENTER. 2. Use the ARROW KEYPAD to edit/enter the data. To drop to the next line, press to the right on the ARROW KEYPAD. Press ENTER when done. On the Waypoint Review and Waypoint Edit pages, you may also delete the selected waypoint, view the waypoint on the map, and move the waypoint on the map.
  • Page 46 Options Menu Waypoint Lists The GPSMAP 172/172C’ s Main Menu Page features two waypoint submenu tabs, ‘User’ and ‘Prox- imity’, that let you manage a large number of waypoints quickly and efficiently. The submenu tabs also provide a continuously updated proximity waypoint alarm function that can be used to define an alarm circle around submerged hazards, shallow waters, etc.

  • Page 47: Lists

    Once a waypont s deleted from the lst, t cannot be recovered from the unt. It s advsable to backup mportant wayponts to a computer usng an optonal PC cable and nterface software, save them to a data card, or wrte them down by hand. To delete an individual waypoint from the ‘User’...

  • Page 48: Waypoint Lists

    Reference Waypoint Lists Proximity Waypoints List Proximity Waypoint Proximity Circle A dashed circle appears showing the alert boundary for the proximity waypoints. To add a proximity waypoint: 1. Use the ARROW KEYPAD to highlight an empty space on the Proximity list and press ENTER. The ‘Find’...

  • Page 49: Going To A Destination

    (roads, rivers, cities, navaids, etc.), or a new map point (non-map item). If you select a map item as the ‘Go To’ destination, the GPSMAP 172/172C automatically uses the name of the map item, but the point is not stored in the waypoint list (see page 13 for creating waypoints using map items).

  • Page 50: Tracback Navigation

    Reference Going to a Destination/ TracBack Navigation ‘Go To MAP Point’ allows you to navigate to a spot on the map that is not a waypoint or map item. Highlight ‘Save’ and press ENTER to save an active track log. To activate an existing waypoint or map item as a ‘Go To’...

  • Page 51: Tracback Navigation

    ENTER. Once a TracBack has been activated, the GPSMAP 172/172C takes the track log currently stored in memory and divides it into segments called ‘legs’. Up to 50 temporary ‘turns’ (BEGIN, TURN 1, TURN 2, TURN 3,..., TURN X, END) are created to mark the most significant features of the track log...

  • Page 52: Mob: Man Overboard

    For more information on setting up the Track options and saved tracks, see pages 61. MOB Key The GPSMAP 172/172C’ s Man OverBoard function (MOB) lets you simultaneously mark and set a course to a position for quick response to emergency situations.

  • Page 53: Routes

    The second way is to ‘Edit as Text’ from the Route Review page, allowing you to see a list of the waypoints as you create, review, or modify the route. All of the GPSMAP 172/172C’ s route functions are accessed through the Main Menu page or the NAV key.

  • Page 54: Creating

    Reference Creating a Route/ Following a Route Choose the type of point you want to add to the route. Choose a waypoint from either the ‘By Name’ or ‘Nearest’ tab list. To create a route using text from the Route Review page: 1.

  • Page 55: List Page

    1. Press the NAV key, highlight ‘Stop Navigation’ and press ENTER. Route List Page The GPSMAP 172/172C Route List page (‘Route’ tab of the Main Menu) displays all the routes currently stored in memory, along with a descriptive name for each route. By pressing MENU while on the Route List page, the following menu options appear: ‘New Route’...

  • Page 56: Review Page

    Reference Route Review Page Route Name Data Fields Route Points Data Totals Route Review Options Menu Route Review Page Once you have created a route, the Route Review page allows you to edit a selected route. To access the Route Review page: 1.

  • Page 57: Editing

    • Edit on Map — review and modify the route displayed for each point (waypoint or map item) on a map page. You may also use the cursor to insert a new route point on a route leg, review the waypoint or map item.

  • Page 58: Editing Routes

    (shown) to create a new route point. The GPSMAP 172/172C’ s route edit mode also allows you to insert a new route point in any route leg using the map cursor. To insert a new point between two existing route waypoints: 1.
  • Page 59 • Trip Planning — The Route Review and Active Route pages also display trip-planning information for each leg or the entire route. Available information includes Course, ETA, Fuel (to point), Leg Distance, Leg Fuel, Leg Time, Sunrise and Sunset (at point location) and Time To (point). To use the trip planning feature: 1.

  • Page 60: Active Route Page

    Active Route Page Menu Options Active Route Page Whenever you have activated a route in the GPSMAP 172/172C, the Active Route page shows each point (waypoint or map item) of the active route, with the point name, distance and choice of Course, ETA, Fuel to point, Leg Distance, Leg Fuel, Leg Time, Sunrise and Sunset at point location, or Time To point for each point from your present position.

  • Page 61: Find Key

    Find Key The FIND key allows you to search the unit for user waypoints, map items, and any optional BlueChart or MapSource information loaded on a data card. Press the FIND key to search for items from your current location by default. You may also search from other locations. When you press FIND, a list of available items to search for appears.

  • Page 62: Find Options

    Reference Find Options Additional Information Tabs Distance, Bearing, Coordinates of item Additional Option Buttons Additional Information Window Find Menu Options To view details about an item: 1. With the desired item highlighted in the search results list, press ENTER. 2. An Information page appears with details about the item organized in a tabbed format. Depending on the type of item, additional options are available for viewing the item on the map, viewing notes on a MapSource or BlueChart map, viewing a tide chart, viewing a list of maps on your data card, and viewing the next item in the search results list.

  • Page 63: Main Menu Page

    “tab” format. The Main Menu page is available from any page in the GPSMAP 172/172C’ s system, and is accessed through the MENU key. See pages 2-3 for additional instructions changing settings and entering data.

  • Page 64: Gps Tab

    As soon as the GPSMAP 172/172C has collected the necessary data from the best satellites in view to calculate a fix, the status field indicates a 2D or 3D status. The unit then updates the position, date and time.

  • Page 65: Main Menu

    WAAS satellites are numbered 33 or higher when viewing the sky view on your GPSMAP 172/172C. Initial reception of the WAAS signal may take up to 15-20 minutes, then 1-2 minutes afterwards. When WAAS differential correction has been received for GPS satellites (numbers 32 or below), a ‘D’...
  • Page 66 DGPS corrections in 3D mode and a ‘D’ shows on the strength bar of satellites being corrected. • Poor GPS Coverage – the receiver is no longer tracking enough satellites for a 2D or 3D fix. • Receiver Not Usable – the receiver is unusable, possibly due to interference or abnormal satel- lite conditions.

  • Page 67: Gps Tab Options

    The GPS Info tab features an options menu that provides access to functions and features relating to the GPS Info display. The following options are available by pressing MENU on the GPS Info Tab of the Main Menu: • Start/Stop Simulator— toggles the unit simulator on or off. Retail Demo mode restores factory settings to the unit if left unattended for over two minutes.

  • Page 68: Tide Tab

    Reference Main Menu: Tide Tab Station Name Date Tide Chart Event Times Main Menu—Tide Tab You can select from a list of nearest stations. Tide Tab— shows a graphical chart which displays tide station information in a 24 hour span starting at midnight.
  • Page 69 To select the nearest tide station from your current location: 1. From the “Tide” tab, highlight the ‘At’ field and press ENTER/MARK. 2. Highlight the desired station on the list and press ENTER/MARK twice. If you are not within this range, you will see a message “None Found”. Use the ‘Nearest To Other’ Find option and select a location closer to a tide station.

  • Page 70: Trip

    Reference Main Menu: Trip/ Celes (Celestial) Tab Main Menu— Trip Tab Date/Time Position Sun/Moon Event Times Skyview Window Moon Phase Position Overhead (90°) 45° 20° Horizon (0°) Main Menu— Celestial Tab Trip Tab— displays data for Trip Odometer, Moving Average speed, Total Average speed, Maximum Speed, Stopped Time, Moving Time, Total Time, and Odometer.

  • Page 71: Track Tab

    Track Tab— lets you specify whether or not to record a track log (an electronic ‘breadcrumb trail’ recording of your path), define how it is recorded, or save track log data for future use. The Track Tab also provides an indicator of the memory used for the active track log and options to clear the track memory or start a TracBack route.
  • Page 72 Reference Main Menu: Track Tab Reviewing a saved track (172 C shown) The track name automatically appears when highlighted on the ‘Saved’ list and NAV is pressed. Saved Submenu Tab— manages a list of any saved track logs, allows TracBack activation, map display of saved logs.

  • Page 73: Dsc Tab

    Position Report and as a unique identifier to the Coast Guard when used in an emergency Distress Call. In order to obtain a Maritime Mobile Service Identity (MMSI) number, users must register their VHF radio with the FCC (Form 605). Garmin does not supply this number!
  • Page 74 Information is available at the following web site: http://apollo.ic.gc.ca/english/mmsi.html. For more information on MMSI’s visit: http://www.navcen.uscg.gov/marcomms/gmdss/mmsi.htm. HOW CAN GARMIN HELP YOU WITH DSC? To receive Distress Calls or Position Reports, you must have a DSC-equipped chartplotter as well as a VHF radio with DSC support.
  • Page 75 MMSI number attached to the call (if you have DSC support). Any DSC-equipped mariner (on sea or land) within range can receive the call. When the Garmin GPSMAP 172/172C is connected to a VHF with DSC support, the GPS unit displays a Call List, Log, and a Directory available to store incoming information received from another user’...
  • Page 76 DSC Log DSC Call List The DSC Call List displays the current calls received. The GPS can manage up to 50 calls. When ‘calls’ are received, they are updated constantly to give the most current information, even if the unit is left unattended.
  • Page 77 DSC users. DSC Setup Garmin chartplotters have the ability to turn DSC ‘On’ or ‘Off’. This option is beneficial for users who have more than one GPS chartplotter. If you want only DSC to display on a particular chartplotter, turn DSC off on the remaining Garmin chartplotters that support DSC.

  • Page 78: Card Tabs

    Card Tab— interface control for saving waypoints, routes and tracks to a data card.When data is saved to a data card, it may be exchanged with other compatible units and Garmin’ s MapSource PC program. To transfer data to/from a data card: 1.

  • Page 79: Temp Tab

    Temp (Temperature) Tab— displays the water temperature log (if equipped with a temperature transducer/sensor). The chart reads from right to left, so that the most recent temperature measured is displayed on the far right side of the chart. The dotted lines within the chart indicate intervals in the temperature scale and the duration of time.

  • Page 80: Units Tab

    • Defaults – restores settings on System page to default values. • All Unit Defaults – restores all settings to Garmin’ s original setup values for the entire unit. Units SubmenuTab— defines settings for Position Format, Map Datum, Heading, Distance, Speed, Elevation, Depth, and Temperature.
  • Page 81 If you are using a map or chart in conjunction with your GPS, make sure the settings under the ‘Units’ tab of the GPSMAP 172/172C match that of the map or chart. This information should be displayed somewhere on the map or chart.

  • Page 82: Comm Tab

    GPSMAP 172/172C to external NMEA devices, a DGPS beacon receiver, a personal computer, another Garmin GPSMAP 172/172C, etc. If a DGPS receiver is used, WAAS capability is automatically turned to ‘Off’. The unit supports two input/output ports. See page 92 for more information on wiring and NMEA information.
  • Page 83 • None – provides no interfacing capabilities. Port 2: • Garmin DGPS – used to connect the GPSMAP 172/172C with a Garmin DGPS beacon receiver. • Other DGPS – allows DGPS input using a standard RTCM format, without any output capabili- ties.
  • Page 84 If ‘Garmin DGPS’ or ‘RTCM In/NMEA Out’ format is selected, additional fields are provided to control a Garmin differential beacon receiver directly from your GPSMAP 172/172C. You may have the unit automatically scan for the DGPS beacon signal or you can enter the beacon frequency and bit rate on the unit and the information is used to tune the beacon receiver.
  • Page 85 NMEA Interface If you are going to interface the GPSMAP 172/172C with another piece of equipment (such as a radio or autopilot), the unit needs to be set to output NMEA data. More information on wiring and NMEA data may be found on page 92.

  • Page 86: Alarm Tab

    Advanced NMEA Setup Page Main Menu—Alarm Tab (System Submenu) GPSMAP 172/172C NMEA Sentence Output (NMEA version 3 .01 compliant) Always transmitted: GPRMC, GPGGA, GPGLL, GPBWC, GPVTG, GPXTE, GPRMB, GPBOD Switchable sentences: GPGSA, GPGSV, GPWPL, GPRTE Garmin proprietary: PGRME, PGRMZ, PGRMM Alarm Tab—...

  • Page 87: Set Alarms

    ENTER to place a check mark in the box. *You must be receiving NMEA Sonar data or using a Garmin GSD 20 Sonar Module for the Sonar alarms to function. Fish Alarm will only function while using a Garmin GSD 20 Sonar Module.

  • Page 88: Appendix A: Loran Td

    LORAN TD Feature The LORAN TD (Time Delay) feature eases the transition from using LORAN to using GPS. The GPSMAP unit automatically converts GPS coordinates to LORAN TDs for those who have a collec- tion of LORAN fixes for favorite fishing spots and other waypoints recorded as TDs.

  • Page 89: Loran Td Setup

    Because of this the unit can navigate to a TD coordinate anywhere in the world. For more information on Loran TDs, you may download Garmin’ s “Loran TD Position Format Handbook” from the Garmin web site.

  • Page 90: Appendix B: Time Offsets

    Appendix B Time Offsets A simple way to determine your local time offset is how many hours you are behind or ahead of UTC (also called ‘Greenwich’ or ‘zulu’ time). Example: EST (Eastern Standard Time) is 5 hours behind UTC, so your offset would be -5. Adding one hour for day- light savings would make EDT (Eastern Daylight Time) - 4.

  • Page 91: Appendix C: Messages

    Arrival At Waypoint— You have arrived at the destination waypoint. Basemap Failed Unit Needs Repair— Internal problem with the unit. Contact your dealer or Garmin Customer Service (pg. iv) to have the unit serviced. Battery Alarm— Specified amount of input voltage has been detected.
  • Page 92 Shallow Water Alarm— Specified shallow water alarm depth has been detected below transducer. Sonar Failed Unit Needs Repair— Internal problem with the unit. Contact your dealer or Garmin Customer Service (page. iv) to have the unit serviced. Track Already Exists: <track name>— You have entered a saved track name that already exists in memory.

  • Page 93: Appendix D: Map Datums

    Adindan Adindan- Ethiopia, Mali, Senegal, Sudan Afgooye Afgooye- Somalia AIN EL ABD ‘70 AIN EL ANBD 1970- Bahrain Island, Saudi Arabia Anna 1 Ast ‘65 Anna 1 Astro ‘65- Cocos I. ARC 1950 ARC 1950- Botswana, Lesotho, Malawi, Swaziland, Zaire, Zambia, Zimbabwe ARC 1960 Kenya, Tanzania Ascnsn Isld ‘58...

  • Page 94: Map Datums

    Appendix D Map Datums Johnston Island Johnston Island Kandawala 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...

  • Page 95: Appendix E: Navigation Terms

    Appendix E Avg Speed— The average of all second-by-second speed readings since last reset. Bearing (BRG)— The compass direction from your present position to a destination waypoint. Navigation Terms Course— The desired course between the active ‘from’ and ‘to’ waypoints. Distance (Dist)—...
  • Page 96 Appendix E Odometer— A running tally of distance travelled, based upon the distance between second-by-second position readings. Navigation Terms Off Course— The distance you are off a desired course in either direction, left or right. Also referred to as ‘cross-track error’ or ‘course error’. DESTINATION Speed—...

  • Page 97: Appendix F: Specifications/Unit Care

    Position*: <15 meters (49 feet), 95% typical* Velocity: 0.05 meters/sec steady state DGPS (USCG) Accuracy: Position: 3-5 meters (10-16 feet) with optional Garmin DGPS receiver, 95% typical* Velocity: 0.05 meters/sec steady state DGPS (WAAS) Accuracy: Position: <3 meters (10 feet), 95% typical* Velocity: 0.05 meters/sec steady state...

  • Page 98: Antenna Installation

    3. Once the GPSMAP 172/172C unit has been installed, connect the cable to the antenna connec- tor on the back of the display unit. Make sure that you turn the antenna cable connector 1/4 turn...

  • Page 99: Unit Installation

    • The mounting surface should be heavy enough to support the unit and protect it from excessive vibration and shock. • For GPSMAP 172/172C unit’ s with the built-in internal antenna, it should be mounted in a location that has the clearest, most unobstructed view of the sky in all directions to ensure the best reception.
  • Page 100 Appendix G Unit Installation Installing the Unit on the Mounting Bracket 1. Align the slot on the back of the unit with the long mounting knob and slide in place. It may be necessary to adjust the long mounting knob to spread the bracket arms apart. (Turn counter-clock- wise to widen the bracket arms, clockwise to tighten.) 2.
  • Page 101 Flush Mounting the GPSMAP 172/172C External Antenna Unit The GPSMAP 172/172C External Antenna only can be flush mounted on a flat panel. When flush mounting the GPSMAP 172/172C, be sure to choose an appropriately sized location for the unit. Check that all cables reach the unit mounting location before beginning installation.
  • Page 102 GPVTG, GPWPL and GPXTE. Proprietary sentences— PGRME, PGRMM, PGRMZ, and PSLIB. The GPSMAP 172/172C also includes NMEA input with support for the WPL sentence, DSC, and sonar NMEA input with support for the DPT (Depth), MTW (Water Temp) and VHW (Water Speed &...
  • Page 103 If you insert a data card and get a ‘card format not recognized’ message, try removing the card and reinserting it. If the card is still not recognized, contact the Garmin or your Garmin dealer for assis- tance. Data cards are not waterproof, should not be exposed to moisture or excessive static charges, and should be stored in the case supplied with the card.

  • Page 104: Appendix G: Installation

    Appendix H Index Accuracy 55 Accuracy Alarm 76 Accuracy Circle 25 Active Route Page 16, 29, 50 Active Route Page Options 50 Active Track Log 61 Alarm Tab 76, 77 Anchor Drag Alarm 76 Append to Route 33 Arrival Alarm 76 ARROW KEYPAD 1 AutoLocate 57 AutoZoom 23...
  • Page 105 Full Screen Map 21 General Tab 23 Going to a Destination 11, 39, 40 Go To 39 Go To Point 11, 39 GPS Information Page 5, 6 GPS Status 5, 6 GPS Tab 5, 54-57 GPS Tab Options 57 Grids 70...
  • Page 106 Appendix H Index Navigation Terms 85, 86 NAV Key 1, 39-42, 68 Nav Line Tab 24 Nearest To Boat 52 Nearest To Destination 52 Nearest To Next 52 Nearest To Other 52 NMEA 72, 73, 75, 76, 92 NMEA Interface 75 NMEA Output Setup 75 North Reference 71 North Up 23...
  • Page 107 Show Data 21 Signal Strength Bars 54 Simulated Tour 12 Simulator 57, 69 Simulator Mode 7, 11, 15 Simulator Set Position 69 Simulator Speed 70 Simulator Track 70 Simulator Track Control 70 Simulator Transducer 70 Skyview Orientation 60 Software License i Software Version 70 Source Tab 23 Specifications 87...
  • Page 110 For the latest free software updates (excluding map data) throughout the life of your Garmin products, visit the Garmin Web site at www .garmin .com . © 2004-2007 Garmin Ltd. or its subsidiaries Garmin International, Inc. 1200 East 151 Garmin (Europe) Ltd.

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