Garmin 168 manual

owner’ s manual and r efer ence guide chartplotting receiver & depth-fi nder GPSMAP 168 Sounder 168 color cover.indd 1 11/18/2002, 3:32:50 PM[...]

i Introduction Forewo rd GARMIN ® , Autolocate ® , See-Thru ® , DCG (Depth Control Gain) ® and T racBack ® ar e r egister ed trademarks, and MapSource TM is a trademark of GARMIN Corporation and may not be used without the expr ess permission of GARMIN Corporation. © Copyright 2000-2002 GARMIN Ltd. or its subsidiaries All Rights Reserved Soft[...]

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 ([...]

Introduction Software License Agreement iv Software License Agreement BY USING THE GPSMAP 168 SOUNDER, YOU AGREE TO BE BOUND BY THE TERMS AND CONDITIONS OF THE FOLLOWING SOFTW ARE LICENSE AGREEMENT . PLEASE READ THIS AGREEMENT CAREFULL Y . GARMIN grants you a limited license to use the software embedded in this device (the “Software”) in binary[...]

Introduction FCC Compliance v FCC Compliance The GPSMAP 168 Sounder complies with Part 15 of the FCC interference limits for Class B digital devices FOR HOME OR OFFICE USE. These limits are designed to pr ovide reasonable pr otection against harmful interference in a residential installation, and ar e more stringent than “outdoor” requir e- men[...]

vi Introduction W arranty and Serial Number The GARMIN GPSMAP 168 Sounder has no user -service- able parts. The GPSMAP 168 Sounder is fastened shut with scr ews. Any attempt to open the case to change or modify the unit in any way will void your warranty and may r esult in permanent damage to the equipment. LIMITED W ARRANTY This GARMIN product is [...]

vii 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 [...]

viii 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 • Bail Mount with knobs • Mounting Bracket* • Mount Bracket with Inter[...]

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

x 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 . + TO DO THIS: SEE P AGE(S): T ur n the unit on or off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4, 6, 19 Initialize the GPS receiver ([...]

1 Getting Started K eypad Usage 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. The IN Key The IN key adjusts the map scale to display a smaller area with more detail. (Zooms in) The OUT Key The OUT key adjusts the map scale to display a [...]

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

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

6 Getting Started P ower On — Screen Contrast GPSMAP 168 Sounder Getting Started T our The GARMIN GPSMAP 168 Sounder is a powerful electronic navigation system that pr ovides detailed map coverage and convenient control of many advanced featur es right from the scr een display . This tour is designed to take you through the basic pages and functi[...]

7 Getting Started Backlighting/ Simulator Mode T o turn on and adjust the backlighting: 1. Press POWER and the Light and Contr ast window will appear . 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 bac[...]

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, Sonar Page, Map 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 pr ocess that centers around 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’ window appears then release the k ey . T he 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 , l[...]

11 Getting Started Using the NA V/MOB K ey 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 store 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 . The options list will appear . (If we were selecting a single waypoint 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 t[...]

13 Getting Started Reviewing/Creating Map W aypoints The waypoint will ‘highlight’ when the cursor is moved over it. W aypoint numbering will start with 001 and continually count up, even if the waypoint name has been deleted. Y ou’ll now have a clearer picture of the route you ar e navigating. Keep in mind that whenever you do exceed the usa[...]

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 P AGE 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 gui[...]

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 36-37 for the complete list). On the Highway Page, let’ s change the ‘TO COURSE’ fi eld to ‘TURN’. T o chan[...]

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. 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 ‘T rack’ menu tab . Y ou will see [...]

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 ‘Diff SNR’ fi elds appear below the ‘Accuracy’ and ‘DOP’ fi elds. The Differential Receiver status will show one of the following: • Off— No optional beacon receiver attached or enabled in the Comm menu • No Signal— DGPS receiver attached, but not transmitting R TCM dat[...]

23 Reference Status P age Options The following options are available: • Start/Stop Simulator— allows you put the unit in simulator mode. See the Getting Started T our for more on using simulator mode. • Enable/Disable W AAS— allows you to activate or deactivate W AAS. ‘W AAS’ is an acronym for “W ide Area Augmentation System’. Y ou[...]

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 ARROW KEYP AD is pressed, the GPSMAP 168 Sounder will enter cursor mode. In cursor mode: • The cursor can be moved over the map display using the ARROW KEYP AD . • When the cursor nears the edge of the display , the map will scroll forward under the cursor . Keep in mind that the boat icon will move with t[...]

26 Reference Map P age Cursor T o hide the cursor and re-center your position on screen: 1. Press the QUIT k ey . T o select an on-screen waypoint or map item with the cursor: 1. Use the ARROW KEYP AD to move the cursor to the desired waypoint or map item (if there are several w aypoints grouped closely together , zoom in for a closer view). 2. Whe[...]

27 Reference Map P age Cursor W ith MapSource Fishing HotSpots data loaded into the GPSMAP 168 Sounder , additional details are available when you highlight a point on the map within a Fishing Hot Spots coverage area. Fish- ing Hot Spots data provides detailed information in tabbed format such as shor eline, depth contours, submerged objects, swimm[...]

28 Reference Map P age Cursor T o view information about a waypoint: 1. Use the ARROW KEYP AD to select a waypoint with the cursor and press ENTER/MARK . The W aypoint Review page will appear . If the w aypoint is located on a map feature (road, intersection, city , lak e, etc.), details about each map feature at that location will be displayed in [...]

29 Reference Map P age Cursor and Zooming 3. T o change the waypoint symbol, name or position coordinates, or enter a depth, use the ARRO W KEYP AD to select the desired fi eld, then press ENTER/MARK . Mak e your changes and press ENTER/MARK again to accept the changes . 4. When you are fi nished making changes, or to accept the waypoint using th[...]

30 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[...]

31 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[...]

32 Reference Map P age Options • Resize Map— enables width adjustment of the Map and Sonar/Flasher split screen. This option is only available when the unit is in ‘Show Sonar’ or ‘Show Flasher’ mode. Y ou may adjust the size of the Sonar/Flasher window anywhere fr om 1/3 to 1/2 width of the right half of the Map Page. T o resize the Map[...]

33 Reference Map P age Options T o change a map setup feature: 1. F rom the Map P age menu, highlight ‘Confi gure Map’ and press ENTER/MARK . 2. Move LEFT or RIGHT on the ARROW KEYP AD to highlight the desired tab , then UP or DOWN on the ARROW KEYP AD to highlight to the setting you want to change and press ENTER/MARK . 3. Move UP or DOWN on [...]

34 Reference Map P age Options W aypoints T ab— W aypoints, Active Route T ext and Zoom settngs, see the description on page 33 for details. Points T ab— Spot Soundings, T ide Stations. Services, Navaids T ext and Zoom settings, see the description on page 33 for details. Nav Line T ab Heading Line— On/Off: turns the Heading Line on or off. T[...]

35 Reference Map P age Options Map Setup Menu Options From the map setup page, you can access the following menu options: • Restore Defaults— restor es settings back to factory settings for the tab highlighted. • Restore All Map Defaults— restor es settings back to factory settings for all tabs. • MapSource Info— allows you to display/n[...]

36 Reference Map P age Options T o change the page layout: 1. F rom the menu, use the ARROW KEYP AD to highlight the ‘Setup Page Layout’ option and press ENTER/MARK . 2. Move up or down on the ARROW KEYP AD to highlight to the desired setting and press ENTER/MARK . To exit, press QUIT . • Change Data Fields — allows you to specify the type [...]

37 Reference Map P age Options Data Field Options continued • TO COURSE – Distance to desired track • TRACK – Current compass heading • TRIP ODOM – T rip Odometer • TTL A VG SPEED – T otal average speed • TTL TRIP TIMER – T otal travel time of trip, stopped and moving • TURN – T urn angle to waypoint • VMG – V elocity Ma[...]

38 Reference Sonar P age Sonar Page The Sonar Page is where your GPSMAP 168 Sounder becomes a powerful fi sh fi 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 whil[...]

39 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 ARRO W KEYP AD until the adjustment bar reaches the top or bottom of the scale , release , then press once more in t[...]

40 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[...]

41 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[...]

42 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[...]

43 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[...]

44 Reference Sonar T ab Options , , T o calibrate the water speed: 1. F rom the ‘Sonar’ tab, use the ARROW KEYP AD to highlight ‘Calibrate W ater 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 speed,[...]

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

46 Reference Highway P age Y ou can confi gure the page to show the active point only and also zoom out to get a better view . Data Fields Curr ent Go T o Route Points Zoom Scale Desir ed T rack Line Curr ent Position Highway Page Whenever a NA V/MOB , T racBack or route has been activated, the GPSMAP 168 Sounder’ s Highway Page will provide dig[...]

47 Reference Highway P age Options Highway Page Options Menu Route Name Route Points Selectable Data Field 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[...]

48 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[...]

49 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[...]

50 Reference Creating and Editing W aypoints Creating W aypoints By T ext Entry W aypoints may also be created by manually entering position coordinates thr ough the ‘W aypt’ tab on the main menu page. T o create a new waypoint by manually entering its coordinates: 1. Press MENU twice to display the main menu page . 2. Highlight the ‘W aypt?[...]

51 Reference Editing W aypoints T o access the Waypoint Edit page: 1. Press MENU twice, highlight the ‘Waypt’ tab, and then highlight a waypoint from the ‘By Name’, ‘Nearest’, or ‘Proximity’ w aypoint lists . Press ENTER/MARK to display the Waypoint Edit page . T o change the waypoint name: 1. Highlight the waypoint name fi eld and[...]

52 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[...]

53 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 through and review the waypoint list: 1. With the ARROW KEYP AD , highlight the ‘W aypt’ tab from the Main Menu P age and then highlight ‘By Name’. 2. Use the ARROW KEYP AD to[...]

54 Reference Nearest/Proximity W aypoint Lists Nearest W aypoint 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 a[...]

55 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 from the waypoint list. • Clear Alarm— removes selected waypoint fr om proximity list. • Clear All— removes all waypoints fr om proximity list. T o displa[...]

56 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) from the list: 1. Use the ARROW KEYP AD to highlight the proximi[...]

57 Reference Going to a Destination T o activate a ‘Go T o’ from the fi nd list: 1. Press the NA V/MOB ke y. 2. Use the ARROW KEYP AD to highlight ‘Go T o P oint’ and press ENTER/MARK . T he ‘Find’ list will be displayed. 3. Select a catagory (i.e . Waypoint, City , F acitilies , T ransportation) from the ‘Find’ list, then using th[...]

58 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[...]

59 Reference T racBack Navigation T o activate a T racBack using the NA V/MOB key: 1. Press the NA V/MOB key , 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 ‘[...]

60 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 key or press the NA V/MOB k ey twice . 2. Press the ENTER/MARK k ey to confi rm and begin[...]

61 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, 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’ from the Route Revie[...]

62 Reference Creating Routes T o create a route graphically from the Route Review page: 1. Press the MENU k ey twice to display the Main Menu page . Use the ARROW KEYP AD to highlight the ‘Route’ tab , then press the MENU key to display the route options page . 2. Select the ‘New Route’ option and press ENTER/MARK . 3. Press MENU , highligh[...]

63 Reference Route List P age Route List Page The GPSMAP 168 Sounder’ s Route List page displays all the routes currently 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 origin[...]

64 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 [...]

65 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[...]

66 Reference Editing Routes The GPSMAP 168 Sounder’ s ‘Edit on Map’ 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[...]

67 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 [...]

68 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[...]

69 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[...]

70 Reference Main Menu: T rack T ab • Sonar— sets up Sonar Page features, speeds and calibrations See pages 42-44. • Systm— defi nes beeper and simulator , restores 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 [...]

71 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— recor ds track plot based upon a user -defi ned variance from your course over ground. The resolution option is [...]

72 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 T ime, 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[...]

73 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[...]

74 Reference Main Menu: Units T ab The Units tab settings will affect how navigation information is displayed on the GPSMAP 168 Sounder . When in doubt, seek assistance. If you ar e using a map or chart in conjunction with your GPS, make sur e the settings under the ‘Units’ tab of the GPSMAP 168 Sounder match that of the map or chart. This info[...]

75 Reference Main Menu: Units T ab Y ou may manually enter a magnetic variation. • 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’ provides magnetic north heading references which ar e automatically det[...]

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

77 Reference Main Menu: Comm T ab If ‘GARMIN DGPS’ or ‘R TCM In/NMEA Out’ format is selected, additional fi elds are pr ovided to control a GARMIN dif ferential beacon receiver directly fr om your GPSMAP 168. Y ou may have the unit automatically scan for the DGPS beacon signal or you can enter the beacon frequency and bit rate on the unit [...]

78 Reference Main Menu: Alarm T ab The DGPS beacon transmitters ar e operated by the U.S. Coast Guard (or similar government agency in other countries), which is responsible for their accuracy and maintenance. For DGPS transmitter problems or to fi nd the most updated list of frequencies and coverage ar eas, contact your local USCG, or see their w[...]

79 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[...]

80 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[...]

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

82 Reference Main Menu: Tide T ab The name of the T ide Station nearest to your current location will appear in the ‘For’ fi eld. Y ou must be within 100 miles of a tide station for a station name to be displayed. If you are not within this range, a message “Search For Stations.” will be displayed in the ‘For’ fi eld. T o search for a[...]

83 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 “ LO ng RA nge N avigation.” The Loran system covers the entire United States and the U.S. Coastal Confl uence Zone. From the perspective of a mariner , the sy[...]

84 Appendix A Loran TD 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/LON for[...]

85 Appendix B Time Offsets The chart below gives an approximate UTC (Universal T ime Coordinate) time of fset 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 [...]

86 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.[...]

87 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 speci- fi ed overlaps the area specifi ed for another proximity waypoint. Adjus[...]

88 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 Astr o ‘65- Cocos I. ARC 1950 ARC 1950- Botswana, Lesotho, Malawi, Swaziland, Zaire, Zambia, Zimbabwe ARC 1960 Kenya, T anzania Ascnsn Isld ‘58 Ascension Island[...]

89 Appendix D Map Datums 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 Astro- Salvage Isl. Massawa Massawa- Eritrea (Ethiopia) Merchich Merchich- Morocco Midway Ast ‘61 Midway Astro ‘61- Midway Minna Minna[...]

90 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 ([...]

91 Appendix E Navigation T erms 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 error’. Speed— The current velocity at which you are travelling, r elative to a ground position. Also r eferred to as ‘ground speed’. Time T o— The estimate[...]

92 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[...]

93 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[...]

94 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[...]

10-18 V olt Boat Supply 95 Appendix G Wiring and Interfacing 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 appropriate harness connections. Replacement fuse is a AGC/3AG - [...]

96 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[...]

97 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[...]

98 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[...]

99 Appendix G Mounting the T ransducer T rolling Motor Installation Included in theT rolling Motor 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 .[...]

100 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[...]

101 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. T he case i[...]

102 Appendix G GPSMAP 168 Sounder P ortable When storing the Suction Cup T ransducer in the case, dr y 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 Alkal[...]

103 Appendix H Understanding Sonar 1 1 2 2 3 3 This fi sh is currently in a Dead Zone and is not detected by the sonar . The fi sh is in the coverage ar ea of the transducer , but r emember– the fi rst strong r eturn sets the bottom level. The fi sh will eventually be detected when the fi rst strong r eturn sets the bottom level below the ?[...]

104 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 appr oximately 1/3 of the water depth. As shown is Example 1, the coverage area at a 30-foot depth is appr oximat[...]

105 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[...]

106 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[...]

107 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 [...]

108 Appendix I Advanced NMEA Setup NMEA Interface If you are going to interface the GPSMAP 168 Sounder with another piece of equipment such as a radar or autopilot the unit has to be set to output NMEA data. The NMEA data can be customized to shorten the update time from the unit. If too many NMEA sentences ar e activated the unit may take longer t[...]

109 Appendix J Index A Accessories ......................................viii, 96 Accuracy ................................................21 Accuracy Circle ......................................34 Active Route Page .............................47, 68 Active Route Page Options .....................68 Adjustment Bar ...........................14, 3[...]

110 Appendix J Index J Jump T o Page .......................................72 K Keel Offset ...........................................43 Keypad Usage .......................................1 L Land Mode ..........................................33 Language Selection ..............................73 Layout .........................................[...]

111 Appendix J Index Routes- Inverting ...................................67 Routes- Naming .....................................64 Routes- Plan Route .................................67 Routes- Removing Points .................65,66 Routes- Reviewing Points .................64,65 S Satellite Sky V iew ...............................5, 20 Scroll Sp[...]

© 2000 - 2002 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 . D 168 colo[...]