Garmin GPSMAP 168 Sounder Owner's Manual And Reference Manual
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Garmin GPSMAP 168 Sounder Owner's Manual And Reference Manual

Garmin GPSMAP 168 Sounder Owner's Manual And Reference Manual

Chartplotting receiver & depth-finder
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  • Page 1 GPSMAP 168 Sounder chartplotting receiver & depth-fi nder owner’s manual reference guide...

  • Page 2: Introduction

    GARMIN International, Inc., 1200 East 151 Street, Olathe, KS 66062, U.S.A. Tel. 913/397.8200 or 800/800.1020 Fax 913/397.8282 GARMIN (Europe) Ltd., Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey SO51 9AQ, U.K. Tel. 44/1794.519944 Fax 44/1794.519222 GARMIN Corporation, No. 68, Jangshu 2 Road, Shijr, Taipei County, Taiwan Tel.
  • Page 3 Part Two is divided into sections that provide detailed references to the advanced features and operations of the GPSMAP 168 Sounder. This allows you to concentrate on a specifi c topic quickly and look up detailed information about the GPSMAP 168 Sounder.

  • Page 4: Warnings And Precautions

    Use the GPSMAP 168 Sounder at your own risk. To reduce the risk of unsafe operation, carefully cartography that is available to us at a reasonable cost. review and understand all aspects of this Owner’ s Manual—and thoroughly practice operation using We use a combination of governmental and private data the simulator mode prior to actual use.
  • Page 5 GARMIN Corporation warrants this product to be free from defects in materials and manufacture Serial Number 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 6: Capabilities

    US state highways and local thoroughfares • 20 reversible routes with up to 30 waypoints each • Uploadable maps up to 2.5 Megabytes of data using GARMIN’ s MapSource PC products • Coordinates: Lat/Lon, UTM/UPS, Loran TD, plus 9 grids, including Maidenhead •...

  • Page 7: 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 168 Sounder Unit •...

  • Page 8: Table Of Contents

    Introduction ......i-viii Going to a Destination ....52 Introduction TracBack .

  • Page 9: How To" Index

    GPSMAP 168 Sounder. Learn about the Map page ....... . 8-9, 24-26 Pan using the map arrow .

  • Page 10: Section One: Getting Started

    Getting Started The IN Key The IN key adjusts the map scale to display a smaller area with more detail. (Zooms in) Keypad Usage The OUT Key The OUT key adjusts the map scale to display a larger area with less detail. (Zooms out) The PAGE Key The PAGE key selects the main pages in sequence and returns display from a submenu page.
  • Page 11 Before moving ahead into GPSMAP 168 Sounder features you will need to learn basic operation. Selecting Options You can select and activate options and enter data to customize the GPSMAP 168 Sounder to fi t your requirements. You can use the ENTER/MARK key and ARROW KEYPAD to select options, enter names and numbers in data fi...

  • Page 12: Entering Data

    Getting Started Naming a waypoint or placing any sort of data that has not been predefi ned requires the use of both the ARROW KEYPAD and the ENTER/MARK key. Entering Data To enter a name or number in a data fi eld: 1.
  • Page 13 GPSMAP 168 Sounder. Initializing the Receiver The fi rst time you power up your new GPSMAP 168 Sounder, the receiver must be given an opportunity to collect satellite data and establish its present position. To ensure proper initialization, the GPSMAP 168 Sounder is shipped from the factory in AutoLocate mode, which will allow the receiver to “fi...

  • Page 14: Initializing The Receiver

    Navigation’ during this process, it is not necessary to initialize the unit. Point to your approximate location The GPSMAP 168 Sounder will now begin searching for the appropriate satellites for your region and press ENTER/MARK. and should acquire a fi x within a few minutes. A signal strength bar for each satellite in view will appear on the top middle of the page, with the appropriate satellite number under each bar.
  • Page 15 3. Press the ENTER/MARK key to fi nish. the contrast slider. The GPSMAP 168 Sounder’ s adjustable screen backlighting is controlled with the POWER key, and may be adjusted at any time from any page. The backlight can cycle through off, user-defi ned, and...

  • Page 16: Simulator Mode

    The GPSMAP 168 Sounder’ s Status Page provides a visual reference of satellite acquisition, receiver Press UP or DOWN on the status, date, time and position coordinates. Each page of the GPSMAP 168 Sounder’ s system also ARROW KEYPAD to move...
  • Page 17 Getting Started The Status Page is one of six main pages used in the GPSMAP 168 Sounder’ s system. The six main pages are the Status Page, Map Page, Sonar Page, Compass Page, Highway Page and Active Route Page. All six pages are linked together in a simple chain, which allows you to scroll through the pages in Status Page/ either direction using the PAGE and QUIT keys.

  • Page 18: Map Cursor

    This will also give you an opportunity to see how the GPSMAP 168 Sounder’ s keypad and ENTER/MARK key are used for data entry and changing the waypoint name and symbol.
  • Page 19 You can choose from a list of 38 the map display or by manually entering position coordinates. Each of these techniques is described in useful symbols. the reference section of the manual and/or on your GPSMAP 168 Sounder Quick Reference Guide.
  • Page 20 For our simulated trip, you’re going to select a pre-programmed tour route using the fi rst method. This will also show how the MENU key is used throughout the GPSMAP 168 Sounder system to provide tab style options and functions. Let’ s start by changing the position to where the practice route is located.
  • Page 21 Getting Started Let’s give it a try by activating the practice route stored in memory for navigation: 1. Press NAV/MOB. The options list will appear. (If we were selecting a single waypoint to navigate Simulated Tour to rather than a route, we could highlight the waypoint on the map, press NAV/MOB and then press ENTER/MARK.) 2.
  • Page 22 Getting Started 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 data in use, the range Reviewing/Creating fi eld will display ‘overzoom’ or ‘NO MAP’ to indicate that you should exercise extreme caution using the Map Waypoints map data.
  • Page 23 The Sonar Page lets you use the GPSMAP 168 Sounder as a fi shfi nder. The top of the screen Getting Started contains any of 27 selectable data fi eld options, while the middle of the page contains a right-to-left moving sonar image of the water beneath your boat.

  • Page 24: Sonar Page

    Another useful feature of the GPSMAP 168 Sounder is the sonar zoom, which allows you to Getting Started instantly “zoom in” to look at a specifi c portion of the sounder display by using the either the IN or OUT key. The Zoom function is divided into four display levels: Sonar Page •...
  • Page 25 Getting Started Now that we’re navigating to an actual destination, let’ s move on to the GPSMAP 168 Sounder navigation pages by pressing the PAGE key. Compass/Highway The GPSMAP 168 Sounder features two different navigation pages: Compass and Highway. The Navigation Pages Compass Page is fi...

  • Page 26: Highway Page

    When the GPSMAP 168 Sounder 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 works.

  • Page 27: Access The Main Menu

    As you’ve seen, the primary pages provide status, map, and navigation information. The tour’ s last page is the Main Menu Page, which allows access to the GPSMAP 168 Sounder’ s waypoint, route and planning functions, various operational and navigation setup features, and celestial and tide data.

  • Page 28: Deleting Track Logs

    2. When the screen is blank, release the POWER key. The next section of the manual describes the pages and functions of the GPSMAP 168 Sounder in detail. If you are unable to locate a specifi c option or function, please refer to the index on pages 105-107.

  • Page 29: Section Two: Reference

    Ready for use As soon as the GPSMAP 168 Sounder has collected the necessary data from the best satellites in view to calculate a fi x, the status fi eld will indicate a 2D or 3D status. The unit will then update the Collecting data position, date and time.
  • Page 30 Reference Receiver Status, Accuracy and DOP Receiver status is indicated at the top fi eld of the page, with the current Accuracy and Dilution Of Status Page Precision (DOP) to the right of the sky view. DOP is an indication of satellite geometry quality measured on a scale of one to ten (lowest numbers the best, highest numbers the poorest).
  • Page 31 DGPS signal being received. If no optional DGPS receiver is used with the GPSMAP 168 Sounder, the ‘DGPS Rcvr’ fi eld will display ‘Off’ and the ‘DGPS SNR’ fi eld will be blank. The SNR will depend upon the mounting of your DGPS receiver and the distance from the DGPS transmitting station.
  • Page 32 Reference The following options are available on the Status Page: • Start/Stop Simulator— allows you put the unit in simulator mode. See the Getting Started Tour for Status Page Options more on using simulator mode. • Track Up/North Up— allows you to select between a north up or track up sky view display for the Status Page only.

  • Page 33: Map Page And Options

    • If the boat icon attempts to go off the display, the zoom level may need to be adjusted to keep cartography on screen. Map Page shown using optional When the ARROW KEYPAD is pressed, the GPSMAP 168 Sounder will enter cursor mode. In MapSource data. cursor mode: •...

  • Page 34: Map Page Cursor

    Reference • When the cursor is stationary, a fi xed coordinate position will appear in the position fi eld. Note that the distance and bearing will change as the boat’ s position changes. Map Page Cursor • Whenever you zoom in cursor mode, the cursor will be centered on the screen. •...
  • Page 35 1. Press the OUT key to zoom out and the IN key to zoom in. The scale value represents the distance from one end of the scale bar to the other. The GPSMAP 168 Sounder’ s system has a built-in worldwide database to 20 mi, with more detailed Using Built-In Basemap coverage available through the use of the optional MapSource software.

  • Page 36: Map Page Options

    Reference Map Page Options Many features of the GPSMAP 168 Sounder are menu driven. Each of the main pages have an Map Page Options options menu, allowing you to custom tailor the corresponding page to your preferences and/or select special features that specifi cally relate to that page. The data window, located at the top of the main pages (Except the Status Page and Active Route Page), provides a user-selectable layout of various types of useful data.
  • Page 37 Reference • Measure Distance— allows you to measure the bearing and distance between any two points on the map display. Map Page Options To measure the BRG/DIS between two points: 1. Highlight the ‘Measure Distance’ option and press ENTER/MARK. An on-screen pointer will appear on the map display at your present position with ‘ENT REF’...

  • Page 38: Map Page Confi Guration

    To resize the Map Page split screen: Reference 1. From the Map Page and Sonar/Flasher split screen, press MENU. Map Page Options 2. Using the ARROW KEYPAD, highlight ‘Resize Map’ and press ENTER/MARK. 3. Move the horizontal double-arrow LEFT or RIGHT using the ARROW KEYPAD until the desired vertical width line shows, then press ENTER/MARK.
  • Page 39 Reference General Tab Detail— Most, More, Normal, Less, Least: controls how much map detail you will see. This setting Map Page Options only applies to any map feature set to “Auto”. Those features which have a specifi ed scale or turned “Off”...
  • Page 40 Topo Tab— Major/Medium/Minor Contours, Land Cover Reference Text— None, Small, Medium, and Large: controls the screen size of the name. Map Page Options Zoom— Auto, Off, 120 ft.-800 mi.: sets the maximum scale at which the feature should appear on the screen.
  • Page 41 To display the MapSource Info Page: Reference 1. From the ‘Map’ tab, press MENU then highlight ‘MapSource Info’ and press ENTER/MARK. Map Page Options 2. Use the ARROW KEYPAD to scroll through the list of downloaded maps. 3. To select/deselect a map, highlight the name of the desired map. Press ENTER/MARK to select/ deselect the map.
  • Page 42 • ALTITUDE – Altitude above/below MSL (Mean Sea Level) Reference • BEARING – Compass direction from your position to destination • COURSE – Course over ground • DEPTH – Depth below transducer Map Page Options • DIST TO DEST – Distance to fi nal waypoint •...

  • Page 43: Sonar Page And Options

    Sonar Page Reference The Sonar Page is where your GPSMAP 168 Sounder becomes a powerful fi shfi nder/fl asher. The Sonar Page top of the screen contains data fi elds which can display any of 27 selectable data fi eld options, while the adjustment bar below the data fi...
  • Page 44 2. With the ARROW KEYPAD, move UP or DOWN and place the pointer or adjustment bar at the Reference desired setting or range. 3. To change ‘View’ to ‘Auto’ or ‘Line’ to ‘Off’, hold UP or DOWN on the ARROW KEYPAD until Sonar Page the adjustment bar reaches the top or bottom of the scale, release, then press once more in the same direction.
  • Page 45 Sonar Page Options Reference The GPSMAP 168 Sounder’ s Sonar Page features a menu page that provides access to additional functions and to layout and data fi eld options. Sonar Page Options To display the Sonar Page options: 1. Press MENU.

  • Page 46: Sonar Page Options

    • Show/Hide Depth Line— adds the ‘Depth Line’ selection to the Adjustment Bar and a horizontal Reference depth line across the display which is used to measure the depth of underwater objects. The depth of the line will appear in a box on the right side of the line. Sonar Page Options To activate/deactivate the Depth Line from the Sonar Page: 1.

  • Page 47: Sonar Page Confi Guration

    Options are ‘Fast’, ‘Medium’, ‘Slow’ or ‘Pause’. Same as above with taget depth attached. If you are using the GPSMAP 168 Sounder on the portable case battery power, slowing the scroll rate will help to conserve your battery.

  • Page 48: Sonar Tab Options

    • Scale— controls the depth ‘Scale’ displayed vertically along the right side of the chart. The Reference depth ‘Scale’ can be confi gured to display four different ways: as an ‘Overlay’, in the ‘Corners’, with ‘Basic’ or ‘No Scale’. Sonar Tab Options •...
  • Page 49 To calibrate the water speed: Reference 1. From the ‘Sonar’ tab, use the ARROW KEYPAD to highlight ‘Calibrate Water Speed’ and press ENTER/MARK. Sonar Tab Options 2. Bring the boat to a cruising speed. Both the top ground and uncalibrated water speeds will be shown at the bottom of the calibration window.

  • Page 50: Compass Page And Options

    The GPSMAP 168 Sounder’ s Compass Page features a menu page that provides access to layout and data fi eld options. The data window, located at the top of the page, provides a user-selectable layout of various types of useful data.

  • Page 51: Highway Page And Options

    Desired Track Line Current Position The GPSMAP 168 Sounder’ s Highway options page allows you to defi ne the data fi elds and select which waypoints are displayed on screen. The data window, located at the top of the page, provides a user-selectable layout of various types of useful data.

  • Page 52: Highway Page Options

    Points Active Route Page When you have activated a route in the GPSMAP 168 Sounder system, the Active Route Page will show each waypoint of the active route, along with various, user-selectable types of data. For additional details on the Active Route Page, see page 64.

  • Page 53: Creating

    Reference Creating and Using Waypoints The GARMIN GPSMAP 168 Sounder stores up to 500 alphanumeric waypoints with a user-defi ned Creating Waypoints icon and depth available for each waypoint. Waypoints can be created using three basic methods: • ENTER/MARK key– used primarily for marking your present position, the ENTER/MARK key also provides options that allow you to select a map position or map item from the map display.

  • Page 54: Creating Waypoints

    To mark a map item, select the desired map item with the cursor. The GPSMAP 168 Sounder will use the map item text shown on the cartography as the default name. When selecting a map item, the option ‘Create Waypoint’ will appear, in addition to a description of that point and its distance and bearing from your current position.

  • Page 55: Waypoints

    Reference Creating Waypoints By Text Entry Waypoints may also be created by manually entering a position’ s coordinates through the ‘Waypt’ Creating and Editing tab on the Main Menu Page. Waypoints To create a new waypoint by manually entering its coordinates: 1.

  • Page 56: Editing Waypoints

    Reference From the Waypoint Edit Page, you may change the name, symbol, position coordinates, or depth for the selected waypoint. Once the changes have been made, highlight ‘OK’ and press ENTER/MARK Editing Waypoints to save them. To change the waypoint name: 1.

  • Page 57: Waypoint List

    Reference Waypoint Submenus The GPSMAP 168 Sounder’ s Main Menu Page features three waypoint submenu tabs, ‘By Name’, Waypoint Options ‘Nearest’, and ‘Proximity’, that let you manage a large number of waypoints quickly and effi ciently. The submenu tabs also provide a continuously updated nearest waypoints list and a proximity waypoint alarm function that can be used to defi...

  • Page 58: Waypoint Options

    Reference To display the waypoint menu options: 1. Using the ARROW KEYPAD, highlight the ‘By Name’ tab and press the MENU key. Waypoint Options To scroll through and review the waypoint list: 1. With the ARROW KEYPAD, highlight the ‘Waypt’ tab from the Main Menu Page and then highlight ‘By Name’.

  • Page 59: Nearest And Proximity

    Reference Nearest Waypoint List The second waypoint submenu list available from the ‘Waypt’ tab is the ‘Nearest’ list, which shows Nearest/Proximity the ten nearest waypoints that are within 100 miles of your present position. The nearest waypoints are continuously updated to your present position, and provide quick access to the closest points of Waypoint Lists safety in emergency situations.

  • Page 60: Proximity Waypoints

    Reference The following options are available from the ‘Proximity’ submenu of the ‘Waypt’ tab: • Add Waypoint— adds a waypoint to the proximity list from the waypoint list. Proximity Waypoints • Clear Alarm— removes selected waypoint from proximity list. • Clear All— removes all waypoints from proximity list. To display the waypoint menu options: 1.

  • Page 61: Going To A Destination

    4. Use the ARROW KEYPAD to highlight the ‘OK’ prompt and press ENTER/MARK to confi rm. Going to a Destination Using the NAV/MOB key, the GPSMAP 168 Sounder provides four ways to navigate to a destina- tion: Go To Waypoint, Follow Track (TracBack), MOB (Man OverBoard), and Follow Route navigation.
  • Page 62 (roads, rivers, cities, navaids, etc.), or a new map point (non-map item). If you are selecting a map item as the ‘Go To’ destination, the GPSMAP 168 Sounder will Choose a waypoint from either the automatically use the name of the map item, but the point will not be stored in the waypoint list.

  • Page 63: Tracback

    Reference TracBack Navigation (Follow Track) The second method of navigating to a destination is by using the TracBack feature. The TracBack TracBack Navigation 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 64: Tracback Navigation

    Once a TracBack has been activated, the GPSMAP 168 Sounder will take the track log currently stored in memory and divide it into segments called ‘legs’. Up to 30 temporary ‘turns’ will be created to mark the most signifi cant features of the track log in order to duplicate your exact path as closely as...

  • Page 65: Mob

    Reference The GPSMAP 168 Sounder’ s Man OverBoard function (MOB) lets you simultaneously mark and set MOB: a course to a position for quick response to emergency situations. Man OverBoard To activate the MOB function: 1. Press and hold the NAV/MOB key or press the NAV/MOB key twice.

  • Page 66: Routes

    Reference Routes The last way to navigate to a destination is to create a user-defi ned route. The GARMIN GPSMAP Creating Routes 168 Sounder system lets you create and store up to 20 reversible routes (numbered 1-20), with up to 30 waypoints each.
  • Page 67 Reference To create a route graphically from the Route Edit map page: 1. Press the MENU key twice to display the Main Menu Page. Creating Routes 2. Use the ARROW KEYPAD to highlight the ‘Route’ tab and press the MENU key to display the route options menu.

  • Page 68: Route List Page

    Route List Page Reference The GPSMAP 168 Sounder Route List Page displays all the routes currently stored in memory, along with a descriptive name for each route. Once a route has been created, it can be activated and Route List Page used for navigation with the NAV/MOB key.

  • Page 69: Reviewing And Editing

    Route Review Page Reference Once you have created a route, the Route Review Page allows you to review and modify the route displayed. Route Review Page To get to the Route Review Page: 1. Press MENU twice to display the Main Menu, then highlight the ‘Route’ tab. Route 2.

  • Page 70: Editing Routes

    Edit on Map— this option allows you to review and modify the route displayed through a pop-up Reference window menu 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 and review the waypoint or map item. Editing Routes To edit the route on the map: 1.
  • Page 71 The GPSMAP 168 Sounder’ s Route Edit mode also allows you to insert a new route waypoint in Reference any route leg using the map cursor. To insert a new point between two existing route waypoints: Editing Routes 1. Use the ARROW KEYPAD to select the leg you want to insert the new waypoint in (the route line will highlight and change to a dotted line when the leg is selected) and press ENTER/MARK.
  • Page 72 Invert— The Invert function will reverse the route you choose. This option is available from both the Reference Route Review and Active Route Pages. To invert a route: Editing Routes 1. From the Route Review or Active Route Page, press MENU. 2.

  • Page 73: Active Route Page

    Reference Active Route Page Whenever you have activated a route in the GPSMAP 168 Sounder system, the Active Route Page 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 74: Main Menu Page

    “tab” format. The Main Menu Main Menu Tabs Page is available from any page in the GPSMAP 168 Sounder’ s system, and is accessed through the MENU key.

  • Page 75: Track Tab

    Reference • Sonar— sets up Sonar Page features, speeds and calibrations See pages 38-40. • Systm— defi nes beeper and simulator, restores setup, and displays software version. Main Menu: • Units— defi nes position format, datum, heading, and distance and speed units. Track Tab •...
  • Page 76 Reference • Interval— defi nes the frequency at which the track plot is recorded. Three interval settings are available: Main Menu: Time— records track plot based on a user-defi ned time interval. Track Tab Resolution— records track plot based upon a user-defi ned variance from your course over ground.

  • Page 77: Trip, Time And Pages Tabs

    Reference Trip Tab— displays Trip Odometer, Moving Average speed, Total Average speed, Maximum Speed, Stopped Time, Moving Time, Total Time, and Odometer. You may reset the data by choosing from Main Menu: ‘Reset Trip’, ‘Reset Odometer’, ‘Reset Max Spd (speed)’, or ‘Reset All’ and pressing ENTER/MARK. Trip, Time and Pages Tabs Time Tab—...

  • Page 78: System Tab

    The following options are available by pressing MENU from the ‘Systm’ tab: • Restore Garmin Setup— restores all settings to Garmin’ s original setup values for the entire unit. • Software Version— displays the unit’ s software, basemap version and serial number.

  • Page 79: Units Tab

    • hddd°mm’ s s.s”— latitude/longitude in degrees, minutes, seconds GPS, make sure the settings under the ‘Units’ tab of the GPSMAP 168 Sounder match that of the map or chart. This • UTM/UPS— Universal Transverse Mercator / Universal Polar Stereographic grids information should be displayed somewhere on the map or •...

  • Page 80: Units Tab

    Reference • Heading— lets you select the reference used in calculating heading information. You can select from ‘Auto Mag Var’, ‘True’, ‘Grid’ and ‘User Mag Var’. ‘Auto Mag Var’ provides magnetic north heading references which are automatically determined from your current position. ‘True’ provides headings Main Menu: based upon a true north reference.

  • Page 81: Communication Tab

    Almanac, Request Proximity, Request Routes, Request Tracks, Request Waypoints, Send Almanac, Send Proximity, Send Routes, Send Tracks and Send Waypoints. • Garmin DGPS— used to connect the GPSMAP 168 Sounder with a Garmin DGPS beacon receiver. • NMEA In/NMEA Out— supports the input/output of standard NMEA 0183 version 2.3 data.

  • Page 82: Comm Tab

    To have the unit automatically scan for a frequency: 1. With the unit set to ‘Garmin DGPS’ or ‘RTCM In/NMEA Out’, use the ARROW KEYPAD to highlight Comm Tab Transfer Modes the ‘Beacon’...
  • Page 83 Reference To manually enter a frequency and bit rate: 1. With the unit set to ‘Garmin DGPS’ or ‘RTCM In/NMEA Out’, use the ARROW KEYPAD to highlight Main Menu: the ‘Beacon’ fi eld and press ENTER/MARK. Comm Tab 2. Highlight ‘User’ and press ENTER/MARK.

  • Page 84: Alarm Tab

    Reference Alarm Tab— allows you to turn an alarm On or Off and defi ne the alarm setting for Anchor Drag, Arrival, Off Course, Clock, Shallow Water, Deep Water, Fish and Battery. Main Menu: • Anchor Drag— sets an alarm to sound when you’ve exceeded a specifi ed drift distance. Enter a Alarm Tab distance up to 9.99 miles or kilometers in the distance fi...
  • Page 85 Reference To set an alarm: 1. Use the ARROW KEYPAD to highlight the fi eld to the right of the alarm name you wish activate Main Menu: and press ENTER/MARK. Alarm Tab 2. Change the mode to ‘On’ (Distance or Time for the ‘Arrival’ alarm) and press ENTER/MARK. 3.

  • Page 86: Celestial Tab

    Reference Celes (Celestial) Tab— displays celestial data for sun and moon rise/set, moon phase, and approximate skyview location of the sun and moon. The moon phase will display the current visible Main Menu: portion of the moon as a light color. You may display this data for your current position, a position Celes (Celestial) Tab from the map, or a waypoint location.

  • Page 87: Tides Tab

    Tide Tab— shows a graphical chart which displays tide station information in a 24 hour span starting Reference at midnight station time. You can choose from different dates and over 3000 tide stations around the USA coastline, Alaska, Hawaii, western Canada and several of the Caribbean islands. Main Menu: Tide Tab The top of the page displays the tide station being referenced, below that the date.

  • Page 88: Tide Tab

    Reference To select the nearest tide station from you current location: 1. From the ‘Tide’ tab, press MENU, then using the ARROW KEYPAD, highlight ‘Nearest Tide Station’ Main Menu: and press ENTER/MARK. Tide Tab The name of the closest station will appear in the ‘For’ fi eld. You must be within 100 miles of a tide station to use the ‘Nearest Tide Station’...

  • Page 89: Appendix A: Loran Td

    Loran TD System Appendix A Loran C is a radio navigation aid operated and maintained in the United States by the United States Loran TD Coast Guard. The name LORAN is an acronym for “LOng RAnge Navigation.” The Loran system covers the entire United States and the U.S.

  • Page 90: Setup Loran Td

    Appendix A When inputting Loran coordinates, you must have the correct chain number, secondary station identifi ers (fi rst and second), and proper map datum available for the TD Loran TD Setup coordinates you input into the GPS unit. For better position accuracy, navigate to the Loran point, then re-mark the point with a GPS unit in LAT/LON format.

  • Page 91: Appendix B: Time Offsets

    Appendix B The chart below gives an approximate UTC (Universal Time Coordinate) time offset for the various longitudinal zones. Check with local charts for more detailed information. If you are in daylight savings Time Offsets time, add one hour to the offset. Longitudinal Zone Offset Longitudinal Zone...

  • Page 92: Appendix C: Messages

    Memory (RAM) Failed Unit Needs Repair— Internal problem with the connections or antenna replacement. unit. Contact your dealer or GARMIN Customer Service (pg. iv) to have Approaching Waypoint— You are a specifi ed alarm distance from a the unit serviced.
  • Page 93 Sonar Failed Unit Needs Repair— Internal problem with the unit. Messages Contact your dealer or GARMIN Customer Service (page. iv) to have the unit serviced. Proximity Alarm List is Full— You have used all ten proximity Track Already Exists: <track name>— You have entered a saved track waypoints.

  • Page 94: Appendix D: Map Datums

    Adindan Adindan- Ethiopia, Mali, Senegal, Sudan Chua Astro Chua Astro- Paraguay Appendix D Afgooye Afgooye- Somalia Corrego Alegr Corrego Alegre- Brazil AIN EL ABD ‘70 AIN EL ANBD 1970- Bahrain Island, Saudi Djakarta Djakarta (Batavia)- Sumatra Island Map Datums Arabia (Indonesia) Anna 1 Ast ‘65 Anna 1 Astro ‘65- Cocos I.

  • Page 95: Map Datums

    Appendix D NAD27 Central North American 1927-Central America Qornoq Qornoq- South Greenland (Belize, Costa Rica, El Salvador, Guatemala, Reunion Reunion- Mascarene Island Honduras, Nicaragua) Rome 1940 Rome 1940- Sardinia Isl. Map Datums NAD27 CONUS North Am. 1927- Mean Value (CONUS) RT 90 Sweden NAD27 Cuba...

  • Page 96: Appendix E: Navigation Terms

    Appendix E Altitude— Height above mean sea level (MSL). Avg Speed— The average of all second-by-second speed readings since last reset. Navigation Terms Bearing (BRG)— The compass direction from your present position to a destination waypoint. Course— The desired course between the active ‘from’ and ‘to’ waypoints. Distance (Dist)—...
  • Page 97 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’. Speed—...

  • Page 98: Appendix F: Specifi Cations

    Cold: Approx. 45 seconds AutoLocate: Approx. 5 minutes Update Rate: 1/second, continuous Position Accuracy: 15 meters (49 feet) RMS; 1-5 meters (3-15 feet) RMS with optional GARMIN DGPS receiver Velocity: 0.1 knot RMS steady state Dynamics: 6g's Sounder Power: 150 watts (RMS), 1200 watts (peak to peak)

  • Page 99: Appendix G: Installation

    BNC connector. If you need assistance, please 3. Once the GPSMAP 168 Sounder unit has been installed, connect the cable to the antenna connector contact Garmin Technical Support at 913-397-8200.

  • Page 100: Unit Installation

    2. Mark and drill the four mounting holes for the fastener you are using. 3. Fasten the bracket to the surface using the appropriate fastener. 4. Insert the GPSMAP 168 Sounder into the mounting bracket. The bracket is designed for a tight fi t to provide additional support when swiveling the unit.
  • Page 101 Appendix G Connecting the Power/Data The power/data cable connects the GPSMAP 168 Sounder to a 10-18 volt DC system and provides interface capabilities for connecting external devices. The color code in the diagram below indicates the Wiring and appropriate harness connections. Replacement fuse is a AGC/3AG - 2 Amp fuse.
  • Page 102 Included in the 010-00199-00 or 010-00202-00 package is a 20° cone angle, temperature sensing, transom mount transducer. This transducer provides good all-around performance. Listed below are a variety of optional transducers and accessories which are available from your local dealer or GARMIN: Narrow cone angle •...

  • Page 103: Mounting The Transducer

    Proper transducer installation is key to getting the best performance from your new unit. If the Appendix G transducer lead is too short, extension cables are available from your GARMIN dealer. DO NOT cut the transducer lead or any part of the transducer cable, as this will void your warranty. The cable cannot be Mounting the Transducer spliced and connected to any existing (Garmin or non-Garmin) transducer cables.
  • Page 104 To avoid drilling a hole to mount a thru-hull transducer, a transom mount transducer may be used Appendix G with epoxy inside a boat (“shoot-thru-hull” installation). For a transducer to be mounted inside the hull (shoot-thru, not thru-hull), the boat must be fi berglass, no core (contact your boat manufacturer if you Mounting the Transducer are unsure).
  • Page 105 Trolling Motor Installation Appendix G Included in the 010-10200-00 transducer kit you should have: Mounting the Transducer 1. Worm Gear Clamp 2. Cable Ties 3. Transducer Mounting the Transducer: 1. Loosen the Worm Gear Clamp until the end of the band is clear of the worm gear. Cable Ties 2.

  • Page 106: Testing The Installation

    Press the POWER button and the GPSMAP 168 Sounder should power on. If the unit fails to power on, verify that the wiring adapter is seated properly in the back of the unit, the Red and Black wires are connected to the correct polarity, and that the 2-Amp fuse is installed and not blown.
  • Page 107 Suction Cup Transducer and a mount for the GPSMAP 168 Sounder. Use the two square eyelets located by the handle to secure the GPSMAP 168 Sounder Portable Case to the boat. The case is water resistant but is not designed to fl oat in the event it should go overboard.
  • Page 108 GPSMAP 168 Sounder Portable Batteries The GPSMAP 168 Sounder Portable comes with a D-Cell battery pack. Eight D-Cell Alkaline batter- ies will provide approximately 20 hours of continuous operation. You have the option of purchasing a 12-Volt rechargeable Gel Cell battery for the portable case from a third-party vendor. The maximum size of the Gel Cell should not exceed 4”H x 2.5”W x 6”L.

  • Page 109: Appendix H: Understanding Sonar

    The fi sh is in the coverage area of the transducer, That is brief description of how your GPSMAP 168 Sounder operates. Let’ s take a look at how this but remember– the fi rst strong return sets the bottom level.

  • Page 110: Transducer Coverage

    The area covered by the transmitted sound waves is determined by the cone angle of the transducer Transducer Coverage and the water depth. Using GARMIN’ s standard 20° transducer, the coverage is approximately 1/3 of the water depth. As shown is Example 1, the coverage area at a 30-foot depth is approximately a 10-foot diameter circle.
  • Page 111 Understanding the Chart Appendix H It is important to understand that the unit does not display a 3-D representation of the underwater Understanding the Chart environment. The unit can display multiple things at the same time, but can not determine where the return originated–...
  • Page 112 Whiteline Appendix H The GPSMAP 168 Sounder can help you to determine if the bottom is hard or soft. When the Understanding the Chart sonar soundwaves are refl ected back by the bottom, a hard bottom will return a stronger signal than a soft bottom.
  • Page 113 One of the unique features offered by GARMIN is See-Thru technology. See-Thru technology Understanding the Chart allows the GPSMAP 168 Sounder to see through thermoclines and helps locate fi sh where they live; and fi sh love the thermocline. A rough defi nition of a thermocline is a break in water where the water temperature changes faster than the water above it.

  • Page 114: Appendix I: Index

    Cursor Movement ......9, 25-26 Appendix I Accessories ........vi, 93 Accuracy ..........21 Index Data Entry ..........2-3 Accuracy Circle ........31 Data Fields, Changing ......32-33 Active Route Page ......43, 64 Data Transfer .........72 Fuel Flow ..........63 Active Route Page Options .....64 Full Screen Map ........27 Date/Time ........20, 68 Adjustment Bar ......14, 34-35 Datum, Map .......70, 85-86...
  • Page 115 Layout ..........32 Registration ..........ii NMEA Output Formats ....72, 92 Loran TD ........80-81 Remember Settings ........39 Noise Reject ...........39 Restore Garmin Setup ......69 Route List Page ........59 Magnetic Variation ......71 Odometers, Trip ........68 Route Review Page .........60 Main Menu ........65-79 Routes ...........57 Off Course Alarm ........75...
  • Page 116 Routes- Inverting ........63 Symbols, Waypoint ....10, 13, 44-49 Appendix I Routes- Naming ........60 System Mode .........69 Routes- Plan Route .........63 Index Routes- Removing Points ....61, 62 Table of Contents ........vii Routes- Reviewing Points ....60-61 Temperature ..........71 Warnings..........iii Thermoclines ......14, 34, 104 Warranty ..........iv Satellite Sky View .......5, 20 Tide Charts ........78-79...
  • Page 118 © 2000 GARMIN Corporation GARMIN International, Inc. 1200 East 151 Street, Olathe, Kansas 66062, U.S.A. GARMIN (Europe) Ltd. Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9AQ, U.K. GARMIN Corporation No. 68, Jangshu 2 Road, Shijr, Taipei County, Taiwan www.garmin.com...

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