Garmin GPSMAP 230 Owner's Manual
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Garmin GPSMAP 230 Owner's Manual

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OWNER'S MANUAL
AND REFERENCE
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Summary of Contents for Garmin GPSMAP 230

  • Page 1 OWNER’S MANUAL AND REFERENCE ZOOM GPSMAP ®...
  • Page 2 Information in this manual is subject to change without notice. GARMIN Corporation 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. Visit the GARMIN website (www.garmin.com) for current updates and supplemental information concerning the use and operation of this and other GARMIN products.

  • Page 3: Foreword

    Help us better support you by completing our on-line registration today! Have the serial number of your GPSMAP 230 handy and con- nect to our website (www.garmin.com). Look for the Product Registration link on the Home page. Why should you register your GPSMAP 230? •...
  • Page 4 GARMIN GPSMAP 230 is a precision electronic NAVigation AID (NAVAID), any NAVAID can be misused or misinterpreted and, therefore, become unsafe. Use the GPSMAP 230 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.
  • Page 5 Designed for detailed electronic charting and simple operation, the GARMIN GPSMAP 230 is a powerful navigation device that can help guide you in water- ways around the world: Precision Performance • 7” High-contrast 4-level gray LCD screen • PhaseTrac12 receiver tracks and uses up to 12 satellites simultaneously for fast, accurate positioning •...
  • Page 6 GARMIN Corporation warrants this product to be free from defects in materials and manufacture for one year from the date of purchase. GARMIN will, at its sole option, repair or replace any components that fail in normal use. Such repairs or replacement will be made at no charge to the customer for parts or labor.
  • Page 7 The Reference portion is divided into sections that provide detailed instruc- tions on the advanced features and operations of the GPSMAP 230. This allows you to concentrate on a specific topic quickly, without reading through entire por- tions of text that you may not need.
  • Page 8 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 230 Unit • External Antenna and 30’ cable • Power/Data Cable • Mounting Bracket and Knobs •...

  • Page 9: Table Of Contents

    Foreword ...i Cautions ...ii Capabilities/Warranty ...iii-iv Preface/Packing List...v-vi Table of Contents/Keypad Usage ...vii-x Getting Started ...1-16 Initializing the Receiver ........1-2 Turning the Unit On &...

  • Page 10: Getting Started

    GETTING STARTED Table Of Contents viii Section 3: Map Page...22-29 Map Page Overview & Data Window ......22 Map Modes Position Mode &...
  • Page 11 APPENDICES Appendix A: GPSMAP 230 Installation ....67-69 Appendix B: Wiring & Specifications ....70-71 Appendix C: Messages .
  • Page 12 The Getting-Started Tour will introduce you to most of the keypad and provide a “hands-on” lesson in using the GPSMAP 230. We strongly encourage you to take the Getting-Started tour before using your unit for actual navigation.

  • Page 13: Initializing The Receiver

    Initializing the Receiver The first time you power up your new GPSMAP 230 is an important step in get- ting the best possible GPS performance. The receiver must be given an opportunity to collect satellite data and establish its present position. To ensure proper initializa- tion, the GPSMAP 230 is shipped from the factory in AutoLocate allow the receiver to “find itself”...
  • Page 14 2. Press to confirm your selection. The GPSMAP 230 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.

  • Page 15: Turning The Unit On & Screen Contrast

    GPSMAP 230 Getting-Started Tour The GARMIN GPSMAP 230 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.

  • Page 16: Satellite Page Intro & Position

    Each page of the GPSMAP 230’ 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.
  • Page 17 The Satellite Page is one of four main pages used in the GPSMAP 230’ 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 tour, let’ s move on to the next page, the Position Page.

  • Page 18: Marking Your Present Position

    Both of these techniques are described in the reference section of the manual and/or on your GPSMAP 230 quick reference guide. To continue our tour, let’ s move on to the Map Page.

  • Page 19: Map

    The GPSMAP 230’ s Map Page combines digital chartplotting with a user-selec- table display of navigation data and a built-in worldwide database to 64 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’...

  • Page 20: Using The Cursor

    Now that you have a feel for how the cursor works, let’ s move on and see how the GPSMAP 230 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...

  • Page 21: Going To A Destination & Activating A Route

    This will also give us an idea of how the GPSMAP 230 system to provide context-sensitive options and functions. Let’ s give it a try by activating the practice route stored in memory for navigation: 1.

  • Page 22: Navigation Simulator & Map Scale Intro

    GETTING STARTED 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.
  • Page 23 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.

  • Page 24: Navigation

    (see page 29). Now that we’re navigating to an actual destination, let’ s move on to the next page of the GPSMAP 230 system, the Navigation Page: 1. Press the key.
  • Page 25 Whenever the GPSMAP 230 is in simulator mode, you can adjust your speed and course from the Navigation Page using the each waypoint in the tour route, try adjusting your boat speed and course to get a feel for how the highway works.

  • Page 26: Changing Simulated Speed & Direction And Highway Scales/Data Fields .13 Active Route Page & Deactivating A Route

    GETTING STARTED Active Route & Main Menu Page 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. Now that you’ve seen the four main pages, let’ s review the active route page, which appears in the main page sequence whenever you are navigating a route: 1.

  • Page 27: Main Menu Intro & Deleting The Track Log

    As you’ve seen, the GPSMAP 230’ 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 230’ s waypoint, route and planning functions, as well as various operational and navigation setup features.

  • Page 28: Turning The Unit Off

    To turn the GPSMAP 230 off: 1. Press and hold the key for about 3 seconds, until the screen is blank. Thank you for choosing the GARMIN GPSMAP 230 navigation system. We hope that it will be a useful tool for you wherever you travel.

  • Page 29: Section 1: Gpsmap Status Page

    Dilution of Precision Status Bar The GPSMAP 230 Satellite Page provides a visual reference of various receiver functions, including current satellite coverage, receiver operating mode and cur- rent receiver accuracy. The status information will give you an idea of what the receiver is doing at any given moment.

  • Page 30: Satellite Status

    SECTION SATELLITE PAGE Receiver Status A. The status bar at the bottom of the page displays important status, alarm, and map scale informa- tion. It also provides on-screen user and message prompts. B. The status bar will display an anchor symbol or ‘PRX’...

  • Page 31: Satellite

    Satellite Page Options The GPSMAP 230’ s Satellite Page features a context-sensitive options page that provides access to functions and features relating to the Satellite Page. To display the Satellite Page options: 1. Press To select a menu option: 1. Highlight the desired option and press The following options are available: •...

  • Page 32: Section 2: Position Page

    Day Status Bar The GPSMAP 230 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 the direction you’re 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).

  • Page 33: Position

    Position Page Options The GPSMAP 230’ 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 To select a menu option: 1. Highlight the desired option and press The following options are available: •...

  • Page 34: Section 3: Map Page

    Boat Icon Status The GPSMAP 230’ 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.

  • Page 35: Map Modes

    • 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 keypad is pressed, the GPSMAP 230 will enter cursor mode. In cursor mode: • The cursor can be moved over the map display using the •...

  • Page 36: Using The Cursor

    SECTION MAP PAGE Using the Cursor 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.

  • Page 37: Selecting Map Scales

    1. Press the up key to zoom out and the down The GPSMAP 230’ s system has a built-in worldwide database to 64 n.m.(see Appendix D for a built-in coverage map), with more detailed coverage available through the use of G-chart...

  • Page 38: Map Page Options

    Map Page Options The GPSMAP 230 Map Page is designed to be a flexible tool that can be cus- tom-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.

  • Page 39: Map Configuration

    • 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.

  • Page 40: Map Colors

    MAP PAGE SECTION Map Configuration & Map Colors A. To calibrate the map, highlight the ‘Calibrate the Map?’ option and press EDIT/ENTER. B. A satellite icon will remain on the map to indi- cate the GPS position, while the boat marker will move to reflect the calibration changes.

  • Page 41: Map Display & Data Fields

    • 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 •...

  • Page 42: Section 4: Navigation Page

    SECTION NAVIGATION PAGE Overview The Navigation Page can be configured to show the active waypoint, all route waypoints and/or nearby waypoints on the graphic highway. GPSMAP 230 Navigation Page Graphic Compass Tape Graphic Highway Pointer to Waypoint Whenever a GOTO, MOB, TracBack or route has been activated, the GPSMAP 230 will provide digital and graphic steering guidance to the destination with the Navigation Page.

  • Page 43: Highway Scale & Navigation

    1. Press the key to select the desired setting. Navigation Page Options The GPSMAP 230’ 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.
  • Page 44 SECTION NAVIGATION PAGE Nav Page Options A. Ten data options are available for each data field on the Navigation Page. The digital crosstrack error option is especially useful to display the exact distance you are off course in feet/miles or meters.

  • Page 45: Section 5: Main Menu Page

    The GPSMAP 230’ s Main Menu Page provides access to various waypoint, sys- tem, navigation, and interface management and setup menus. The Main Menu Page is available from any page in the GPSMAP 230’ s system, and is accessed through key.

  • Page 46: Marking Your Present Position

    (see page 51). Creating and Using Waypoints The GARMIN GPSMAP 230 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: •...
  • Page 47 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 cur- sor. The GPSMAP 230 will use the navaid text shown on the cartography as the default comment.

  • Page 48: Creating Waypoints On Map & By Text

    WAYPOINTS SECTION Creating Waypoints On Map & By Text A. Once a position has been selected on map, the create new waypoint page will appear. Here you can change the waypoint name, symbol or com- ment before saving the waypoint. B.

  • Page 49: Reference Waypoints

    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 230 will then calculate the position coordinates for you, using the reference selected.

  • Page 50: Reviewing And Editing Waypoints By Text

    WAYPOINTS SECTION Reviewing & Editing Waypoints A. The waypoint definition page will appear when- ever 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 com- ment is the date and time of creation.

  • Page 51: Waypoint Definition

    Waypoint Definition Page Options 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.

  • Page 52: Waypoint Submenus & Nearest Waypoints

    Waypoint Submenus The GPSMAP 230’ 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 way- point alarm function that can be used to define an alarm circle around submerged hazards, shallow waters, etc.

  • Page 53: Proximity Waypoints

    Proximity Waypoints 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 99.99 nautical or statute miles or kilometers.

  • Page 54: Create Waypoint & Waypoint List

    WAYPOINTS SECTION Create Waypoint & Waypoint List A. The waypoints list displays all waypoints stored in memory in a two-column format. Temporary waypoints created by the TracBack feature are assigned a ‘TXXX’ name and a footprint symbol. B. The waypoints list options page lets you delete individual waypoints or the entire waypoint list.

  • Page 55: Section 7: Goto/Mob/Tracback Functions

    If you are selecting a navaid or a new position as the GOTO destination, the GPSMAP 230 will automatically create or move the waypoint named ‘MAP’ at the navaid or map position.

  • Page 56: Goto Key

    SECTION GOTO/MOB GOTO Options 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. B. The nearest waypoints list limits waypoint choic- es to provide quick access to nearby anchorages, facilities, etc.

  • Page 57: Mob & Tracback Navigation

    2. Select the ‘Cancel GOTO’ option and press TracBack Navigation The third method of navigating to a destination is by using the GPSMAP 230’ 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.
  • Page 58 2. Highlight the ‘Start TracBack?’ option and press Once a TracBack has been activated, the GPSMAP 230 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 fea- tures of the track log in order to duplicate your exact path as closely as possible.

  • Page 59: Section 8: Routes

    (numbered 1-20), with up to 30 waypoints each. Routes can be created and modi- fied right from the Map Page, allowing you to see each route on-screen as you cre- ate, review, modify, or navigate the route. All of the GPSMAP 230’ s route functions are accessed through the main menu.

  • Page 60: Reviewing And Editing Routes On Map

    ROUTES SECTION Reviewing & Editing Routes On Map A. To move a route waypoint, select the ‘Move?’ option and press EDIT/ENTER. B. Move the arrow cursor to the new waypoint posi- tion and press EDIT/ENTER to confirm. Once a route has been created on the map (and the to finish), the map display will automatically enter the route review mode.

  • Page 61: Route Edit Mode

    The GPSMAP 230’ s route edit mode also allows you to insert a new route way- point 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 you want to insert the new waypoint in (the route line will change to a dotted line when the leg is selected) and press 2.

  • Page 62: Route Edit Options

    ROUTES SECTION Editing Routes & Route Editing Options A. To remove a route waypoint, highlight the way- point on the map, press EDIT/ENTER, and select the ‘Remove?’ option from the pop-up window. B. The route edit options page lets you activate, invert, or deactivate the route you are editing.
  • Page 63 Route List Page The GPSMAP 230’ 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 1-20 serve as storage routes (route 20 is stored as the GPSMAP tour route, which may be deleted at any time).

  • Page 64: Route List

    SECTION ROUTES Route List Options 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.

  • Page 65: Active Route Page

    Active Route Page Whenever you have activated a route in the GPSMAP 230 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, cumula- tive distance and ETE or ETA for each waypoint from your present position.

  • Page 66: Active Route

    ROUTES SECTION Active Route Page Options The ‘Change Data Fields?’ option lets you specify what information is displayed for each route way- point. Four data options are available: distance, desired track, and ETA or ETE to each route way- point. Active Route Page Options The following options are available from the active route page: •...

  • Page 67: Section 9: Setup Menus

    Track Log Submenu The 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.

  • Page 68: Trip And Fuel Planning

    Trip and Fuel Planning The GPSMAP 230’ s trip and fuel planning submenu lets you plan and review distance, fuel, and ETE/ETA information between any two waypoints; your pre- sent position and a stored waypoint; or any part of a stored route. Sunrise and sunset information is also provided.

  • Page 69: Route And Trip Planning

    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 2.

  • Page 70: Sunrise/Sunset Planning

    • Operational Mode lets you select between normal operation and simulator mode. The GPSMAP 230’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.

  • Page 71: System Setup

    • 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 230’s screen backlighting. Six settings are available: No Timeout (the backlight will stay on until it is turned off), 15 seconds (default setting);...

  • Page 72: Navigation Setup

    SECTION SETUP MENUS Navigation Setup A. The GPSMAP 230 will also display position coor- dinates 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.
  • Page 73 B. Keeping the velocity filter on the ‘Auto’ setting will allow the GPSMAP 230 to automatically monitor and adjust the response time for track and speed calculations.

  • Page 74: Timers & Alarms

    SECTION SETUP MENUS Timers & Alarms 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.

  • Page 75: Input & Output Setup

    Data Transfer is a proprietary interface that allows you to exchange data such as way- points, routes, and track logs between GPSMAP units or a GARMIN PC kit. No In/NMEA Out provides navigation information to a compatible NMEA device such as an autopilot or radar.

  • Page 76: Nmea & Dgps Setup

    SECTION SETUP MENUS NMEA & DGPS Setup A. Select the desired format from the NMEA field. The baud rate will automatically be set to the appropriate speed. 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’s automated FAX service (703-313-5920).

  • Page 77: Section 10: Using G-Chart Cartridges

    2. Insert the card (label facing front and G-chart logo at top) into the slot. 3. Use your thumb to firmly push the cartridge into place. If your GPSMAP 230 is on, a con- firmation tone will sound when the cartridge has been properly installed and accepted.

  • Page 78: Using G-Chart Cartridges

    When you leave the area covered by the main map of a cartridge, the GPSMAP 230 will default back to using the built-in 64 nm database if it is avail- able at the current scale.

  • Page 79: Gpsmap 230 Installation

    GPS antenna’ s reception. Never paint the antenna or clean it with harsh solvents. The GARMIN antenna screws directly onto any standard 1” x 14-thread antenna mount. If you need to raise the antenna to avoid shading, try using a 1” x 14- thread extension mast available at most marine dealers.
  • Page 80 GPSMAP 230 may also be used with a Johnny Ray JR-300 swivel mount. 3. Fasten the gimbal mount to the surface using the appropriate fasteners. 4. Insert the GPSMAP 230 into the gimbal mount. The mount is designed for a tight fit to provide additional support when swiveling the unit.
  • Page 81 4. Drill the four 0.25” screw holes, using a 1/4” drill bit 5. Cut the center relief section from the panel. 6. From the front, place the GPSMAP 230 into the relief hole until the unit rests flush against the mounting surface.

  • Page 82: Wiring &Specifications

    GPSMAP unit. Connecting the Power/Data Cable The power/data cable connects the GPSMAP 230 to a 10-40 volt DC system and provides interface capabilities for connecting external devices, including an external alarm. The color code in the diagram below indicates the appropriate harness connections.

  • Page 83: Wiring & Specifications

    ** Subject to accuracy degradation to 100m 2DRMS under the U.S. DOD-imposed Selective Availability Program. WARNING! The temperature range for the GPSMAP 230 is -4 to +158ºF (-20 to 70ºC). Extended exposure to temper- atures exceeding this range (in storage or operating conditions) may cause failure of the LCD screen.

  • Page 84: Appendix C: Messages

    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 installa- tion of a new battery. Need Altitude—Your GPSMAP system needs the altitude to maintain a position fix due to poor satellite coverage.

  • Page 85: Messages

    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 230 system. SECTION...

  • Page 86: Appendix D: Map Datums

    SECTION APPENDIX Map Datums The GPSMAP 230’s built-in worldwide database includes chart coverage down to 64 nm (120 km) for the areas outlined above. Note that the GPSMAP database is only valid to 68º15’ of latitude. The maximum cursor latitude is 85º05’, and the maxi- mum waypoint latitude is 89º24.543 north or south.

  • Page 87: Map Datums

    Corrego Alegr Corrego Alegre- Brazil Kerguelen Islnd Djakarta Djakarta (Batavia)- Sumatra Kertau 1948 Island (Indonesia) L. C. 5 Astro Dos 1968 Dos 1968- Gizo Island Liberia 1964 (New Georgia Islands) Luzon Mindanao Easter Isld 67 Easter Island 1967 Luzon Philippine European 1950 European 1950- Austria, Belgium,...

  • Page 88: Map Datums

    SECTION APPENDIX Map Datums NAD27 Greenland North American 1927- Reunion Greenland (Hayes Rome 1940 Peninsula) RT 90 NAD27 Mexico N. American 1927- Mexico Santo (Dos) NAD27 San Salvadr North American 1927- San Sao Braz Salvador Island NAD83 North American 1983- Sapper Hill ‘43 Alaska, Canada, Central America, CONUS, Mexico...

  • Page 89: Appendix E: Navigation Terms

    Almanac Data—The satellite constellation information (including location and health of SECTION APPENDIX satellites) that is transmitted to your receiver from every GPS satellite. Almanac data must be acquired before GPS navigation can begin. Glossary Bearing (BRG)—The compass direction from your position to a destination. Course Over Ground (COG)—Direction of movement relative to a ground position.
  • Page 90 Universal Time Coordinated (UTC)— The time of day at the prime meridian (0º longi- SECTION tude) in Greenwich, England. APPENDIX Universal Transverse Mercator- (UTM)— A grid coordinate system that projects global Glossary 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 desti- nation.

  • Page 91: Appendix F: Time Offset Chart

    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...

  • Page 92: Loran Td Position Format

    Setup TD field, the active waypoint information will reflect those changes. Since the GPSMAP 230 does not rely on the loran signal for navigation, it can reference a different GRI chain and/or secondary stations and still navi- gate to the location stored in memory.

  • Page 93: Index

    Desired Track (DTK) Alarm Setup Depth Contours Anchor Drag Alarm Depth Units Antenna Installation Dilution of Precision (DOP) Arrival Alarm DGPS Setup AutoLocate 1-2,18 DGPS Status Backlight Level Entering Initial Position Beacon Receiver Setup 63-64 Estimated Position Error (EPE) Bearing Estimated Time of Arrival (ETA) Bearing/Distance Calculation Estimated Time Enroute (ETE)
  • Page 94 SECTION APPENDIX Index Keypad Tone Offset, local time Keypad Usage viii Operation Mode Setup Overzoom Mode Language Setup Local Time Offset Packing List Loran TD Positon Format Page Sequence Physical Specifications Point-to-Point Planning Magnetic Variation Position Mode Main Menu Position Page Man Overboard Function Position Format Map Calibration...
  • Page 95 Reviewing Routes Route Comments Velocity Filter Route Planning Mode Velocity Made Good (VMG) Stopping Route Navigation Satellite Acquisition 2,17-18 Waypoints Satellite Sky View Signal Strength Bars 2,17 Simulator Mode Simulator Tour 4-16 Status Bar Status Page 17-19 Steering Guidance 13,30-32 Sunrise/Sunset Calculation System Setup 58-59...
  • Page 96 ® © 1999-2000 GARMIN Corporation GARMIN International, Inc. 1200 East 151st Street, Olathe, Kansas 66062, U.S.A. GARMIN (Europe) Ltd. Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9AQ, U.K. GARMIN (Asia) Corporation No. 68, Jangshu 2nd Road, Shijr, Taipei County, Taiwan www.garmin.com...

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