Garmin GPSMAP 168 manual

owner’ s manual and r efer ence guide chartplotting receiver & depth-fi nder GPSMAP 168 Sounder 168 color cover.indd 01/09/01, 9:49 AM 1[...]

i Introduction F oreword GARMIN ® , Autolocate ® , See-Thru ® , DCG (Depth Contr ol Gain) ® and T racBack ® ar e r egister ed trademarks, and MapSour ce TM is a trademark of GARMIN Corporation and may not be used without the expr ess permission of GARMIN Corporation. © 2000 GARMIN Corporation Software V ersion 2.50 or above Internal Database [...]

ii Introduction Preface and Registration Preface Congratulations on choosing one of the most advanced depth sounding and marine navigation systems available! The GARMIN GPSMAP 168 Sounder utilizes the proven performance of GARMIN GPS and full featured depth sounding and mapping to create an unsurpassed marine navigation chartplotter and fi shfi n[...]

iii Introduction W arnings and Precautions The GPS system is operated by the United States government, which is solely responsible for its accuracy and maintenance. The system is subject to changes which could affect the accuracy and performance of all GPS equipment. Although the GARMIN GPSMAP 168 Sounder is a precision electronic NA Vigation AID ([...]

iv Introduction W arranty and Serial Number The GARMIN GPSMAP 168 Sounder has no user -service- able parts. Should you ever encounter a pr oblem with your unit, please contact your GARMIN dealer or GARMIN Customer Service department (913-397-8200) for r epairs. The GPSMAP 168 Sounder is fastened shut with scr ews. Any attempt to open the case to ch[...]

v Introduction Capabilities Designed for detailed electronic charting capability , the GARMIN GPSMAP 168 Sounder is a powerful navigation device that can give you the navigation information you need: Precision Perfor mance • High-contrast, four -level gray , LCD screen with backlighting • 12-channel parallel receiver tracks and uses up to 12 sa[...]

vi P acking 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 . Standard Package: • GPSMAP 168 Sounder Unit • GA 29 Exter nal Antenna and 30’ cable* (P/N 010-00174-00) • Inter nal [...]

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . i-viii Forewor d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i Preface and Registration . . . . . . . . . . . . . . . . . . ii W arnings and Precautions . . . . . . . . . . . . . . . iii W arranty and Serial Number . . . . . . . . . . . . . iv Capabilities . . . . . . . [...]

viii Introduction “How T o” Index The list to the right is pr ovided to help you quickly fi nd some of the mor e important pr ocedur es you will use on your new GPSMAP 168 Sounder . H TO DO THIS: SEE P AGE(S): T ur n the unit on or off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4, 6, 19 Initialize the GPS receive[...]

1 Getting Started K eypad Usage OUT IN PA G E Always pr ess and r elease a key to perform its primary function. Pr essing and holding the ENTER/MARK or NA V/MOB keys will activate their secondary function. ENTER MARK MENU QUIT NA V MOB ZOOM Arrow K eypad P ower K ey The IN Key The IN key adjusts the map scale to display a smaller area with more det[...]

2 Getting Started Selecting Options How T o Select Options and Enter Data Before moving ahead into GPSMAP 168 Sounder features you will need to learn basic operation. Y ou can select and activate options and enter data to customize the GPSMAP 168 Sounder to fi t your requirements. Y ou can use the ENTER/MARK key and ARROW KEYP AD to select options[...]

3 Getting Started Entering Data Naming a waypoint or placing any sort of data that has not been predefi ned requires the use of both the ARROW KEYP AD and the ENTER/MARK key . T o enter a name or number in a data fi eld: 1. Once you have accessed a page with programmable data fi elds (i.e . ‘ Waypoint Edit’) you can use the ARROW KEYP AD to [...]

4 Initializing the Receiver Getting Started The GPSMAP 168 Sounder’ s advanced keypad system is designed to allow for fast, convenient selection of navigation options and data entry . The Getting Started T our will intr oduce you to the keypad and provide a “hands-on” lesson in using the GPSMAP 168 Sounder . W e strongly encourage you to take[...]

5 Getting Started Initializing the Receiver I T o graphically initialize the GPSMAP 168 Sounder: 1. F rom the Satellite P age , press the MENU k ey . The Satellite P age options menu window will appear . 2. Using the ARROW KEYP AD , highlight ‘Initialize P osition’ and press ENTER/MARK to initialize the receiver from the built-in worldwide map [...]

6 Getting Started P ower On/Screen Contr ast GPSMAP 168 Sounder Getting Started T our The GARMIN GPSMAP 168 Sounder is a powerful electronic navigation and depth sounding system that provides detailed map coverage and convenient contr ol of many advanced features right from the scr een display . This tour is designed to take you through the basic p[...]

7 Getting Started Backlighting/ Simulator Mode T o turn on and adjust the backlighting: 1. Press POWER to activ ate the Light and Contrast window . 2. Press POWER again and the user -defi ned level of backlighting will activate . Y ou may adjust this level by pressing UP or DOWN on the ARROW KEYP AD . If you press PO WER one more time , the backli[...]

8 Getting Started Status P age/ Map P age 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 scr oll through the pages in either di[...]

9 Getting Started Map Cursor Using the Map Cursor W orking from the Map Page is a simple process that centers ar ound the use of the cursor . Controlled by the ARROW KEYP AD , the cursor is an important tool that can be used to pan to other map locations, mark and edit waypoints and routes, and r eview position data of on-screen map items and waypo[...]

10 Getting Started Marking W aypoints T o mark your present position: 1. Hold down the ENTER/MARK k ey until the New Waypoint P age appears then release the key . The window will show a default three-digit waypoint name/number (001), symbol (dot), and position. Y ou can leave the name as the auto-assigned number , but for this exercise , lets chang[...]

11 Getting Started Using the NA V/MOB Key Going to a Destination GPS is all about marking positions as waypoints and navigating to them using the receiver’ s steering guidance and map displays. W e’ve already seen how to use the ENTER/MARK key to stor e our present position, so it’ s time to move on to the fun part—going to a destination. T[...]

12 Getting Started Simulated T our Let’ s give it a try by activating the practice route stored in memory for navigation: 1. Press NA V/MOB . T he options list will appear . (If we were selecting a single w aypoint to navigate to rather than a route , we could highlight the w aypoint on the map , press NA V/MOB and then press ENTER/MARK .) 2. Use[...]

13 Getting Started Reviewing/Creating Map W aypoints Y ou’ll now have a clearer picture of the r oute 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 fi eld will display ‘overzoom’ or ‘NO MAP’ to indicate that you should exercise extre[...]

14 Getting Started Sonar P age The Sonar Page lets you use the GPSMAP 168 Sounder as a fi shfi nder . The top of the screen 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. (Note: Items appear on the screen as they pass under your transduce[...]

15 Sonar P age Getting Started Another useful feature of the GPSMAP 168 Sounder is the sonar zoom, which allows you to 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: • 2X Split––Shows two reduced-size sonar pictur es [...]

16 Getting Started Compass/Highway Navigation P ages Now that we’re navigating to an actual destination, let’ s move on to the GPSMAP 168 Sounder navigation pages by pressing the PA G E key . The GPSMAP 168 Sounder features two dif ferent navigation pages: Compass and Highway . The Compass Page is fi rst. This page provides graphic steering gu[...]

17 Getting Started Highway P age The GPSMAP 168 Sounder’ s Highway Page also provides graphic steering guidance to a destination waypoint. As you head toward your destination, the middle of the scr een provides visual guidance to your waypoint on a moving graphic “highway .” Y our present position is at the bottom center of the highway displa[...]

18 Getting Started Data Fields/Active Route P age/ Main Menu P age The main pages’ (except the Status and Active Route Pages) data fi elds may also be confi gured to display any of 27 differ ent information categories (see page 32 for the complete list). On the Highway Page, let’ s change the ‘TO COURSE’ fi eld to ‘TURN’. T o change [...]

19 Getting Started Deleting T rack Logs/ P owering Off Unit T o get a feel for how the Main Menu Page works, let’ s clear out the track log you created during the simulated tour . This will ensure that you have a clean slate once you start navigating in your home waters. T o select the T rack submenu tab: 1. Use the ARROW KEYP AD to highlight the[...]

20 Reference Status P age Status Page The GPSMAP 168 Sounder Status Page provides a visual r eference of satellite acquisition, receiver status, date, time and position coordinates. The status information will give you an idea of what the receiver is doing at any given moment. The sky view and signal strength bars give you an indication of what sat[...]

21 Reference Status P age Receiver Status, Accuracy and DOP Receiver status is indicated at the top fi eld of the page, with the current Accuracy and Dilution Of 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).[...]

22 Reference Status P age Options The ‘DGPS Rcvr’ and ‘Dif f SNR’ fi elds appear below the ‘Accuracy’ and ‘DOP’ fi elds. The Dif ferential Receiver status will show one of the following: • Off— No optional beacon r eceiver attached or enabled in the Comm menu • No Signal— DGPS receiver attached, but not transmitting R TCM [...]

23 Reference Status P age Options The following options are available on the Status Page: • Start/Stop Simulator— allows you put the unit in simulator mode. See the Getting Started T our for more on using simulator mode. • T rack Up/North Up— allows you to select between a north up or track up sky view display for the Status Page only . •[...]

24 Reference Map P age Map Page The GPSMAP 168 Sounder’ s Map Page provides a comprehensive display of electr onic cartography , plotting and navigational data. When using the unit with the optional MapSource softwar e, the map display shows your boat on a digital chart, complete with geographic names, map items, navaids and a host of other chart[...]

25 Reference Map P age Cursor • 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. • Whenever you zoom in cursor mode, the cursor will be centered on the scr een. • T o return to position mode, press the QUIT key .[...]

26 Reference Map P age Cursor and Zooming T o eliminate the cursor and r e-center your position on-screen: 1. Press the QUIT ke y. The cursor may also be used to create new waypoints directly fr om the map. T o create a waypoint with the cur sor: 1. Use the ARROW KEYP AD to move the cursor to the desired map position. 2. Press the ENTER/MARK k ey a[...]

27 Reference Map P age Options Map Page Options Many features of the GPSMAP 168 Sounder are menu driven. Each of the main pages have an options menu, allowing you to custom tailor the corresponding page to your prefer ences and/or select special features that specifi cally relate to that page. The data window , located at the top of the main pages[...]

28 Reference Map P age Options • Measure Distance— allows you to measure the bearing and distance between any two points on the map display . T o 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 R[...]

29 Reference Map P age Options T o resize the Map P age split screen: 1. F rom the Map P age and Sonar/Flasher split screen, press MENU . 2. Using the ARROW KEYP AD , highlight ‘Resize Map’ and press ENTER/MARK . 3. Move the horizontal double-arrow LEFT or RIGHT using the ARROW KEYP AD until the desired vertical width line shows , then press EN[...]

30 Reference Map P age Options General T ab Detail— Most, Mor e, Normal, Less, Least: controls how much map detail you will see. This setting only applies to any map feature set to “Auto”. Those features which have a specifi ed scale or turned “Off” ar e unaffected by this setting. Orientation— North Up— fi xes the top of the map di[...]

31 Reference Map P age Options T opo T ab— Major/Medium/Minor Contours, Land Cover T ext— None, Small, Medium, and Large: contr ols the screen size of the name. Zoom— Auto, Of f, 120 ft.-800 mi.: sets the maximum scale at which the feature should appear on the screen. Some types of data will only show up to certain zoom scales. Other T ab Bea[...]

32 Reference Map P age Options T o display the MapSource Info P age: 1. F rom the ‘Map’ tab , press MENU then highlight ‘MapSource Info’ and press ENTER/MARK . 2. Use the ARROW KEYP AD to scroll through the list of downloaded maps. 3. T o select/deselect a map , highlight the name of the desired map . Press ENTER/MARK to select/ deselect th[...]

33 Reference Map P age Options • AL TITUDE – Altitude above/below MSL (Mean Sea Level) • BEARING – Compass direction fr om your position to destination • COURSE – Course over ground • DEPTH – Depth below transducer • DIST TO DEST – Distance to fi nal waypoint • DIST TO NEXT – Distance to next waypoint • ET A A T DEST – [...]

34 Reference Sonar P age Sonar Page The Sonar Page is where your GPSMAP 168 Sounder becomes a powerful fi shfi nder/fl asher . The top of the scr een contains data fi elds which can display any of 27 selectable data fi eld options, while the adjustment bar below the data fi elds allows direct access to the settings most commonly changed while[...]

35 Reference Sonar P age 2. With the ARROW KEYP AD , move UP or DOWN and place the pointer or adjustment bar at the desired setting or range . 3. T o change ‘View’ to ‘ Auto’ or ‘Line’ to ‘Off’, hold UP or DOWN on the ARROW KEYP AD until the adjustment bar reaches the top or bottom of the scale , release , then press once more in th[...]

36 Reference Sonar P age Options Sonar Page Options 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. T o display the Sonar P age options: 1. Press MENU . T o select a menu option: 1. Use the ARROW KEYP AD to highlight the desired option and press ENTER/M[...]

37 Reference Sonar P age Options • Show/Hide Depth Line— adds the ‘Depth Line’ selection to the Adjustment Bar and a horizontal depth line across the display which is used to measur e the depth of underwater objects. The depth of the line will appear in a box on the right side of the line. T o activate/deactivate the Depth Line from the Son[...]

38 Reference Sonar T ab Options • Confi gure Sonar— contains the unit settings that should not require fr equent change. The Sonar setup menu contains settings for Fish Symbols, Whiteline, Scr oll Speed, Scale, Noise Reject, Keel Of fset, W ater T ype, Remember , and Calibration. T o enter the Sonar setup menu, press the MENU key from the Sona[...]

39 Reference Sonar T ab Options • Scale— contr ols the depth ‘Scale’ displayed vertically along the right side of the chart. The depth ‘Scale’ can be confi gured to display four differ ent ways: as an ‘Overlay’, in the ‘Corners’, with ‘Basic’ or ‘No Scale’. • Noise Reject— helps fi lter unwanted noise from the char[...]

40 Reference Sonar T ab Options I I T o calibrate the water speed: 1. F rom the ‘Sonar’ tab , use the ARRO W KEYP AD to highlight ‘Calibr ate Water Speed’ and press ENTER/MARK . 2. Bring the boat to a cruising speed. Both the top ground and uncalibrated w ater speeds will be shown at the bottom of the calibration window . Note your top spee[...]

41 Reference Compass P age Compass Page The GPSMAP 168 Sounder features two dif ferent navigation pages: Compass and Highway . When a NA V/MOB , Follow T rack (T racBack) or Follow Route has been activated, the GPSMAP 168 Sounder’ s Compass Page will guide you to your destination with digital readouts and a graphic compass display , which include[...]

42 Reference Highway P age Highway Page When a NA V/MOB , T racBack or route has been activated, the GPSMAP 168 Sounder’ s Highway Page will provide digital and graphic steering guidance to the destination. The top half of the Highway Page features user -selectable data fi elds that display useful navigation data. The middle section of the scree[...]

43 Reference Highway P age Options The following options are available fr om the Highway Page menu: • Show/Hide T racks— toggles the display of track lines on/off. • Confi gure Highway— allows you to select what waypoints are shown on the Highway display . Four options are available: • Rte & Nearest— all r oute and nearest waypoint[...]

44 Reference Creating W aypoints Creating and Using Waypoints The GARMIN GPSMAP 168 Sounder stores up to 500 alphanumeric waypoints with a user -defi ned icon and depth available for each waypoint. W aypoints can be created using three basic methods: • ENTER/MARK key– used primarily for marking your present position, the ENTER/MARK key also pr[...]

45 Reference Creating W aypoints 5. T o enter an optional depth, highlight the ‘Depth’ fi eld to the right of the position coordinates and press the ENTER/MARK k ey , then use the ARROW KEYP AD to enter a value and press ENTER/MARK . 6. When done , use the ARROW KEYP AD to highlight the ‘OK’ prompt and press ENTER/MARK to save the waypoint[...]

46 Reference Creating and Editing W aypoints Creating Waypoints By T ext Entry W aypoints may also be created by manually entering a position’ s coordinates thr ough the ‘W aypt’ tab on the Main Menu Page. T o create a new waypoint by manually entering its coor dinates: 1. Press MENU twice to display the Main Menu P age . 2. Highlight the ‘[...]

47 Reference Editing W aypoints From the W aypoint 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 to save them. T o change the waypoint name: 1. Highlight the waypoint name fi eld and press ENTER/MARK . 2. Use the ARROW K[...]

48 Reference W aypoint Options W aypoint Submenus The GPSMAP 168 Sounder’ s Main Menu Page features three waypoint submenu tabs, ‘By Name’, ‘Nearest’, and ‘Pr oximity’, that let you manage a large number of waypoints quickly and effi ciently . The submenu tabs also provide a continuously updated near est waypoints list and a proximit[...]

49 Reference W aypoint Options T o display the waypoint menu options: 1. Using the ARROW KEYP AD , highlight the ‘By Name’ tab and press the MENU ke y. T o scroll thr ough and review the waypoint list: 1. With the ARROW KEYP AD , highlight the ‘Waypt’ tab from the Main Menu P age and then highlight ‘By Name’. 2. Use the ARROW KEYP AD to[...]

50 Reference Nearest/Proximity W aypoint Lists Nearest Waypoint List The second waypoint submenu list available from the ‘W aypt’ tab is the ‘Nearest’ list, which shows the ten nearest waypoints that are within 100 miles of your pr esent position. The nearest waypoints are continuously updated to your present position, and pr ovide quick ac[...]

51 Reference Proximity W aypoints The following options are available fr om the ‘Proximity’ submenu of the ‘W aypt’ tab: • Add W aypoint— adds a waypoint to the proximity list fr om the waypoint list. • Clear Alarm— removes selected waypoint fr om proximity list. • Clear All— removes all waypoints fr om proximity list. T o displ[...]

52 Reference Proximity Alarms T o turn proximity alarms on or off: 1. Use the ARROW KEYP AD to highlight the fi eld below ‘Proximity Alarm’ and press ENTER/MARK . 2. Select the desired ‘ON’ or ‘OFF’ setting and press ENTER/MARK . T o clear one or all proximity waypoint(s) fr om the list: 1. Use the ARROW KEYP AD to highlight the proxim[...]

53 Reference Going to a Destination T o activate a ‘Go T o’ from the waypoint list: 1. Press the NA V/MOB ke y. 2. Use the ARROW KEYP AD to highlight ‘Go To W aypoint’ and press ENTER/MARK . 3. T o select a waypoint from the w aypoint lists , use the ARROW KEYP AD to highlight either the ‘By Name’ or ‘Nearest’ tab , select a waypoin[...]

54 Reference T racBack Navigation T racBack Navigation (Follow T rack) The second method of navigating to a destination is by using the T racBack feature. The T racBack function allows you to retrace your path using the track log automatically stored in the r eceiver’ s memory , which will eliminate the need to store waypoints along the way . T r[...]

55 Reference T racBack Navigation T o activate a T racBack using the NA V/MOB key: 1. Press the NA V/MOB k ey , then highlight the ‘F ollow T rack’ option and press ENTER/MARK . 2. Highlight the track you wish to follow and press ENTER/MARK . 3. Choose either ‘Original’, which will navigate you from the end to the start of your trip , or ?[...]

56 Reference MOB: Man OverBoard MOB The GPSMAP 168 Sounder’ s Man OverBoard function (MOB) lets you simultaneously mark and set a course to a position for quick response to emer gency situations. T o activate the MOB function: 1. Press and hold the NA V/MOB k ey or press the NA V/MOB key twice . 2. Press the ENTER/MARK k ey to confi rm and begin[...]

57 Reference Creating Routes Routes The last way to navigate to a destination is to create a user -defi ned route. The GARMIN GPSMAP 168 Sounder system lets you create and store up to 20 r eversible routes (number ed 1-20), with up to 30 waypoints each. Routes can be created and modifi ed in two ways. The fi rst way is to ‘Edit as T ext’ fro[...]

58 Reference Creating Routes T o create a r oute graphically from the Route Edit map page: 1. Press the MENU k ey twice to display the Main Menu P age . 2. Use the ARROW KEYP AD to highlight the ‘Route’ tab and press the MENU k ey to display the route options menu. 3. Select the ‘New Route’ option and press ENTER/MARK . 4. Press MENU , high[...]

59 Reference Route List P age Route List Page The GPSMAP 168 Sounder Route List Page displays all the routes curr ently stored in memory , along with a descriptive name for each route. Once a r oute has been created, it can be activated and used for navigation with the NA V/MOB key . A route may be followed in the same sequence as it was originally[...]

60 Reference Route Review P age Route Review Page Once you have created a r oute, the Route Review Page allows you to review and modify the route displayed. T o get to the Route Review P age: 1. Press MENU twice to display the Main Menu, then highlight the ‘Route’ tab . 2. Highlight the name of the route you wish to review and press ENTER/MARK [...]

61 Reference Editing Routes Edit on Map— this option allows you to review and modify the r oute displayed through a pop-up window menu for each point (waypoint or map item) on a map page. Y ou may also use the cursor to insert a new route point on a r oute leg and review the waypoint or map item. T o edit the route on the map: 1. F rom the Route [...]

62 Reference Editing Routes The GPSMAP 168 Sounder’ s Route Edit mode also allows you to insert a new route waypoint in any route leg using the map cursor . T o insert a new point between two existing route waypoints: 1. Use the ARROW KEYP AD to select the leg you want to insert the new waypoint in (the route line will highlight and change to a d[...]

63 Reference Editing Routes Invert— The Invert function will reverse the r oute you choose. This option is available from both the Route Review and Active Route Pages. T o invert a route: 1. F rom the Route Review or Active Route Page , press MENU . 2. Using the ARROW KEYP AD , highlight ‘Invert’ and press ENTER/MARK . Plan Route— The Route[...]

64 Reference Active Route P age Active Route Page Whenever you have activated a route in the GPSMAP 168 Sounder system, the Active Route Page shows each point (waypoint or map item) of the active route, with the point name, distance and choice of Course, ET A, Fuel to point, Leg Distance, Leg Fuel, Leg Time, Sunrise and Sunset at point location, or[...]

65 Reference Main Menu T abs Main Menu Page The GPSMAP 168 Sounder’ s Main Menu Page provides access to various waypoint, system, naviga- tion and interface management, and setup menus in an easy to use “tab” format. The Main Menu Page is available from any page in the GPSMAP 168 Sounder’ s system, and is accessed through the MENU key . See[...]

66 Reference Main Menu: T rack T ab • Sonar— sets up Sonar Page features, speeds and calibrations See pages 38-40. • Systm— defi nes beeper and simulator , restor es setup, and displays software version. • Units— defi nes position format, datum, heading, and distance and speed units. • Comm— interface settings for use with a PC or[...]

67 Reference Main Menu: T rack T ab • Interval— defi nes the frequency at which the track plot is recor ded. Three interval settings are available: T ime— records track plot based on a user -defi ned time interval. Resolution— r ecords track plot based upon a user -defi ned variance from your course over ground. The r esolution option is[...]

68 Reference Main Menu: T rip , Time and P ages T abs T rip T ab— displays T rip Odometer , Moving A verage speed, T otal A verage speed, Maximum Speed, Stopped T ime, Moving T ime, T otal Time, and Odometer . Y ou may reset the data by choosing fr om ‘Reset T rip’, ‘Reset Odometer’, ‘Reset Max Spd (speed)’, or ‘Reset All’ and pre[...]

69 Reference Main Menu: Systm (System) T ab Systm (System) T ab— controls system setting for beeper , speed fi lter , languages, system mode, simulator controls, r estores factory settings, and displays software version. The following settings are available: • Beeper— contr ols audible beep. Select from ‘Of f ’, ‘Alarms Only’ (sounds[...]

70 Reference Main Menu: Units T ab Units T ab— defi nes Position Format, Map Datum, Heading, and units of measure for Distance, Speed, Altitude, Depth and T emperature. The following settings are available: • Position Format— is used to change the coor dinate system in which a given position reading is displayed. Y ou should only change the [...]

71 Reference Main Menu: Units T ab • Heading— lets you select the refer ence used in calculating heading information. Y ou can select from ‘Auto Mag V ar’, ‘T rue’, ‘Grid’ and ‘User Mag V ar’. ‘Auto Mag V ar’ pr ovides magnetic north heading references which ar e automatically determined from your current position. ‘T rue?[...]

72 Reference Main Menu: Comm T ab Comm T ab Serial Data For mats Data T ransfer Pr ogr ess Comm (Communications) tab— lets you control the input/output format used when connecting your GPSMAP 168 Sounder to external NMEA devices, a DGPS beacon receiver , a personal computer , another Garmin GPSMAP 168/162, etc. Eight format settings are available[...]

73 Reference Main Menu: Comm T ab Comm T ab T ransfer Modes T o select a transfer mode: 1. Use the ARROW KEYP AD to select ‘Garmin Data T ransfer’ in the ‘Serial Data F ormat’ fi eld. 2. Highlight the ‘T ransfer Mode’ fi eld and press ENTER/MARK . 3. Use the ARROW KEYP AD to select the desired setting and press ENTER/MARK . T o restor[...]

74 Reference Main Menu: Comm T ab T o manually enter a frequency and bit r ate: 1. With the unit set to ‘Garmin DGPS’ or ‘R TCM In/NMEA Out’, use the ARROW KEYP AD to highlight the ‘Beacon’ fi eld and press ENTER/MARK . 2. Highlight ‘User’ and press ENTER/MARK . 3. Highlight the ‘F requency’ or ‘Bit Rate’ fi eld, press ENT[...]

75 Reference Main Menu: Alarm T ab Alarm T ab— allows you to tur n an alarm On or Off and defi ne the alarm setting for Anchor Drag, Arrival, Off Course, Clock, Shallow W ater , Deep W ater , Fish and Battery . • Anchor Drag— sets an alarm to sound when you’ve exceeded a specifi ed drift distance. Enter a distance up to 9.99 miles or kilo[...]

76 Reference Main Menu: Alarm T ab T o set an alarm: 1. Use the ARROW KEYP AD to highlight the fi eld to the right of the alarm name you wish activate and press ENTER/MARK . 2. Change the mode to ‘On’ (Distance or Time for the ‘ Arrival’ alarm) and press ENTER/MARK . 3. Highlight the next fi eld to the right and press ENTER/MARK , then en[...]

77 Reference Main Menu: Celes (Celestial) T ab Celes (Celestial) T ab— 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 curr ent visible portion of the moon as a light color . Y ou may display this data for your current position, a position from th[...]

78 Reference Main Menu: Tide T ab Tide T ab— shows a graphical chart which displays tide station information in a 24 hour span starting at midnight station time. Y ou can choose from dif ferent dates and over 3000 tide stations ar ound the USA coastline, Alaska, Hawaii, western Canada and several of the Caribbean islands. The top of the page disp[...]

79 Reference Main Menu: Tide T ab T o select the nearest tide station fr om you current location: 1. F rom the ‘T ide’ tab , press MENU , then using the ARRO W KEYP AD , highlight ‘Nearest T ide Station’ and press ENTER/MARK . The name of the closest station will appear in the ‘For’ fi eld. Y ou must be within 100 miles of a tide stati[...]

80 Appendix A Loran TD Loran TD System Loran C is a radio navigation aid operated and maintained in the United States by the United States Coast Guard. The name LORAN is an acr onym for “LOng RAnge Navigation.” The Loran system covers the entire United States and the U.S. Coastal Confl uence Zone. From the perspective of a mariner , the system[...]

81 Appendix A Loran TD Setup 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 coordinates you input into the GPS unit. F or better position accuracy , navigate to the Loran point, then re-mark the point with a GPS unit in LA T/[...]

82 Appendix B Time Offsets The chart below gives an approximate UTC (Universal T ime Coordinate) 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 Offset W180.0º to W172.5º -12 W172.5º to W157.5º -11 W157.5º t[...]

83 Appendix C Messages The GPSMAP 168 Sounder uses an on-screen pop-up message system to alert you to unit operating characteristics. Press the ENTER key to acknowledge and return to the page you were viewing. Alarm Clock— The alarm clock has sounded. Alarm V oltage Set T oo High Set to 16.0V— V oltage range must be between 10.0 and 16.0 volts.[...]

84 Appendix C Messages Proximity Alarm List is Full— Y ou have used all ten proximity waypoints. Proximity Alarm W aypoint— Y ou have entered the alarm radius for the proximity waypoint indicated. Proximity Overlaps Another Pr oximity W aypoint— The alarm radius specifi ed overlaps the area specifi ed for another proximity waypoint. Adjust [...]

85 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, T anzania Ascnsn Isld ‘58 Ascension Island [...]

86 Appendix D Map Datums Kandawala Kandawala- Sri Lanka Kerguelen Islnd Kerguelen Island Kertau 1948 W est Malaysia, Singapore L.C. 5 Astro Cayman Brac Island Liberia 1964 Liberia 1964- Liberia Luzon Mindanao Luzon- Mindanao Island Luzon Philippine Luzon- Philippines (excluding Mindanao Isl.) Mahe 1971 Mahe 1971- Mahe Island Marco Astr o Marco Astr[...]

87 Appendix E Navigation T erms Altitude— Height above mean sea level (MSL). A vg Speed— The average of all second-by-second speed readings since last reset. Bearing (BRG)— The compass direction fr om your present position to a destination waypoint. Course— The desired course between the active ‘fr om’ and ‘to’ waypoints. Distance ([...]

88 Appendix E Navigation T erms Odometer— A running tally of distance travelled, based upon the distance between second-by-second position readings. Off Course— The distance you are of f a desired course in either direction, left or right. Also r eferred to as ‘cross-track err or’ or ‘course err or’. Speed— The current velocity at whi[...]

89 Appendix F Specifi cations Physical Specifi cations Size: 4.63" H x 6.0" W x 2.75" D (11.7cm x 15.2cm x 7cm) W eight: 1 lb. 6 oz. (.763 kg) Display: 4.2" diagonal (10.7cm) high-contrast, 4-level gray LCD with backlighting (240 x 240 pixels) Case: Fully gasketed, high-impact plastic alloy , waterproof to IEC 529-IPX-7 T empe[...]

90 Appendix G Antenna Installation Installing the GPSMAP 168 Sounder The GPSMAP 168 Sounder must be properly installed accor ding to the following instructions to get the best possible performance. If you have the 168 Sounder with the built-in internal bail mount antenna (010-00202-00), you may skip this section and proceed to the next page. For un[...]

91 Appendix G Unit Installation Mounting the GPSMAP 168 Sounder Unit The GPSMAP 168 Sounder’ s compact, waterproof case is suitable for mounting in exposed loca- tions or at the nav station. The unit comes with a gimbal bracket for surface or overhead mounting. When choosing a location for the display unit, make sure you consider the following co[...]

F If your boat has an electrical system, it may be possible to wir e the unit dir ectly to an unused holder on your curr ent fuse block. If you ar e using the boat’ s fuse block, r emove the in-line fuse holder supplied with the unit. If your boat does not have a fuse block, the unit can be wir ed dir ectly to the battery . Make sur e the 2-Amp i[...]

93 Appendix G Selecting A T ransducer T ransducers The transducer acts as the eyes and ears of your new sonar . Proper transducer selection and installation are critical to the operation of your unit. The transducer transmits sound waves towar d the bottom in a cone shape. The larger the cone angle, the lar ger the coverage area at a given depth. W[...]

94 Appendix G Mounting the T ransducer Proper transducer installation is key to getting the best performance fr om your new unit. If the transducer lead is too short, extension cables are available fr om 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 spl[...]

95 Appendix G Mounting the T ransducer T o avoid drilling a hole to mount a thru-hull transducer , a transom mount transducer may be used 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 manufactur er i[...]

96 Appendix G Mounting the T ransducer T rolling Motor Installation Included in the 010-10200-00 transducer kit you should have: 1. Worm Gear Clamp 2. Cable Ties 3. T ransducer Mounting the T ransducer: 1. Loosen the Worm Gear Clamp until the end of the band is clear of the worm gear . 2. Slide the clamp band through the slots on the transducer . 3[...]

97 Appendix G T esting the Installation T esting the Installation While it is possible to perform some checks with the boat trailered, the boat should be in the water to properly test 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 [...]

98 Appendix G GPSMAP 168 Sounder P ortable The Portable Case The Portable Case is designed for rugged use and pr ovides storage for the Battery Pack, the Portable Suction Cup T ransducer and a mount for the GPSMAP 168 Sounder . Use the two square eyelets located by the handle to secure the GPSMAP 168 Sounder P ortable Case to the boat. The case is [...]

99 Appendix G GPSMAP 168 Sounder P ortable When storing the Suction Cup T ransducer in the case, dry the transducer and cable to avoid corrosion. If using in Salt W ater , rinse the transducer and cable in fresh water and dry before storing in the case. Batteries The GPSMAP 168 Sounder Portable comes with a D-Cell battery pack. Eight D-Cell Alkalin[...]

100 Appendix H Understanding Sonar Understanding Sonar If you are familiar with sonar , and can determine what is on the chart, this section may not be for you. This section is intended to help the novice user gain some understanding of how the GPSMAP 168 Sounder operates and how it can help improve their fi shing pr oductivity . T o understand wh[...]

101 Appendix H T ransducer Coverage T ransducer Coverage The area covered by the transmitted sound waves is determined by the cone angle of the transducer 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 appr oximate[...]

102 Appendix H Understanding the Chart Understanding the Chart It is important to understand that the unit does not display a 3-D representation of the underwater environment. The unit can display multiple things at the same time, but can not determine wher e the return originated– only when it was received. Example 2 provides a look at the under[...]

103 Appendix H Understanding the Chart Whiteline The GPSMAP 168 Sounder can help you to determine if the bottom is hard or soft. When the sonar soundwaves are refl ected back by the bottom, a har d bottom will return a stronger signal than a soft bottom. The stronger bottom r eturn, the wider the bottom layer is displayed. The unit uses the whitel[...]

104 Appendix H Understanding the Chart Thermoclines One of the unique features of fered by GARMIN is See-Thru technology . See-Thru technology 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 w ater [...]

105 Appendix I Index A Accessories ........................................vi, 93 Accuracy ................................................21 Accuracy Circle ......................................31 Active Route Page .............................43, 64 Active Route Page Options .....................64 Adjustment Bar ...........................14, 3[...]

106 Appendix I Index J Jump T o Page .......................................68 K Keel Offset ...........................................39 Keypad Usage .......................................1 L Land Mode ..........................................31 Language Selection ..............................69 Layout .........................................[...]

107 Appendix I Index Routes- Inverting ...................................63 Routes- Naming .....................................60 Routes- Plan Route .................................63 Routes- Removing Points .................61, 62 Routes- Reviewing Points .................60-61 S Satellite Sky View ...............................5, 20 Scroll Sp[...]

168 Manual Part 2.indd 01/09/01, 9:46 AM 108[...]

© 2000 GARMIN Corporation GARMIN International, Inc. 1200 East 151 st 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 nd Road, Shijr , T aipei County , T aiwan www .garmin.com Part Number 190-00170-00 Rev . B 168 color cover[...]