GPSMAP 168 Sounder chartplotting receiver & depth-finder owner’s manual and reference guide 168 color cover.
© Copyright 2000-2002 GARMIN Ltd. or its subsidiaries All Rights Reserved Introduction Foreword Software Version 3.03 or above Internal Database Version 2.00 GARMIN International, Inc. 1200 East 151st Street, Olathe, Kansas 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 2nd Road, Shijr, Taipei County, Taiwan Tel.
Preface Introduction Preface and Registration 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 fishfinding package.
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 NAVigation AID (NAVAID), any NAVAID can be misused or misinterpreted and, therefore, become unsafe.
Software License Agreement Introduction Software License Agreement BY USING THE GPSMAP 168 SOUNDER, YOU AGREE TO BE BOUND BY THE TERMS AND CONDITIONS OF THE FOLLOWING SOFTWARE LICENSE AGREEMENT. PLEASE READ THIS AGREEMENT CAREFULLY. GARMIN grants you a limited license to use the software embedded in this device (the “Software”) in binary executable form in the normal operation of the product. Title, ownership rights and intellectual property rights in and to the Software remain in GARMIN.
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 provide reasonable protection against harmful interference in a residential installation, and are more stringent than “outdoor” requirements.
LIMITED WARRANTY Introduction Warranty and Serial Number Serial Number Use this area to record the serial number (8-digit number located on the bottom of the unit) in case it is lost, stolen, or needs service. Be sure to keep your original sales receipt in a safe place or attach a photocopy inside the manual. Serial Number: This GARMIN product is warranted to be free from defects in materials or workmanship for one year from the date of purchase.
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 Performance • High-contrast, four-level gray, LCD screen with backlighting • 12-channel parallel receiver tracks and uses up to 12 satellites for fast, accurate positioning • Differential-Ready — just add an optional GARMIN beacon receiver for better than 5-meter accuracy • Fully gasketed, high-impact plastic alloy case, waterpro
Introduction Packing List , GPSMAP 168 Sounder Standard and Optional Transducers Unit part numbers 010-00199-00 and 010-00202-00 include a 200 kHz, 20 degree, plastic, depth and temp, transom mount transducer. For a complete list of optional transducers, see page 93. 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.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . i-viii Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i Preface and Registration . . . . . . . . . . . . . . . . . .ii Warnings and Precautions . . . . . . . . . . . . . . . iii Warranty and Serial Number . . . . . . . . . . . . . iv Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . v Packing List . . . . . . . . . . . . . . . . . . . . . . . . . . vi “How To” Index . . . . . . . . . . . . . . . . . . . .
Introduction “How To” Index + The list to the right is provided to help you quickly find some of the more important procedures you will use on your new GPSMAP 168 Sounder. TO DO THIS: SEE PAGE(S): Turn the unit on or off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4, 6, 19 Initialize the GPS receiver (first time use) . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 Adjust screen contrast or backlighting . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The IN Key The IN key adjusts the map scale to display a smaller area with more detail. (Zooms in) Getting Started The OUT Key The OUT key adjusts the map scale to display a larger area with less detail. (Zooms out) Keypad Usage The PAGE Key The PAGE key selects the main pages in sequence and returns display from a submenu page. The ARROW KEYPAD The ARROW KEYPAD is used to select (Highlight) menu options and enter data. It also controls cursor movement on the Map Page.
How To Select Options and Enter Data Getting Started Selecting Options Before moving ahead into GPSMAP 168 features, you will need to learn basic operation. You can select and activate options and enter data to customize the GPSMAP 168 to fit your requirements. You can use the ENTER/MARK key and ARROW KEYPAD to select options, enter names and numbers in data fields, and activate your selections. To select and activate an optional feature: 1.
Naming a waypoint or placing any sort of data that has not been predefined requires the use of both the ARROW KEYPAD and the ENTER/MARK key. To enter a name or number in a data field: 1. Once you have accessed a page with programmable data fields (i.e. ‘ Waypoint Edit’) you can use the ARROW KEYPAD to move the cursor (highlight) to fields on the page. Use the UP/DOWN arrows to move up or down and the LEFT/RIGHT arrows to move sideways. 2.
Getting Started Initializing the Receiver 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 Tour will introduce you to the keypad and provide a “hands-on” lesson in using the GPSMAP 168 Sounder. We strongly encourage you to take the Getting Started tour before using your unit for actual navigation.
To graphically initialize the GPSMAP 168 Sounder: 1. From the Status Page, press the MENU key. The Status Page options menu window will appear. 2. Using the ARROW KEYPAD, highlight ‘Initialize Position’ and press ENTER/MARK to initialize the receiver from the built-in worldwide map. The Initialize Position Page will appear, prompting you to select your approximate location with the map cursor. Getting Started Initializing the Receiver 3.
GPSMAP 168 Sounder Getting Started Tour Getting Started Power On — Screen Contrast The GARMIN GPSMAP 168 Sounder is a powerful electronic navigation system that provides detailed map coverage and convenient control of many advanced features right from the screen display. This tour is designed to take you through the basic pages and functions of the system using the simulator mode.
To turn on and adjust the backlighting: 1. Press POWER and the Light and Contrast window will appear. 2. Press POWER again and the user-defined level of backlighting will activate. You may adjust this level by pressing UP or DOWN on the ARROW KEYPAD. If you press POWER one more time, the backlighting will be at the maximum setting. Getting Started Backlighting/ Simulator Mode 3. Press ENTER/MARK or QUIT when done.
Getting Started Status Page/Map Page Status Page 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 scroll through the pages in either direction using the PAGE and QUIT keys.
Using the Map Cursor Getting Started Working from the Map Page is a simple process that centers around the use of the cursor. Controlled by the ARROW KEYPAD, the cursor is an important tool that can be used to pan to other map locations, mark and edit waypoints and routes, and review position data of on-screen map items and waypoints. Map Cursor To get a feel for using the Map Page and using the cursor, try the following exercise: 1. Use the IN/OUT keys to set the map scale to the 50 nm setting.
To mark your present position: Getting Started Marking Waypoints 1. Hold down the ENTER/MARK key until the ‘New Waypoint’ window appears then release the key. The window will show a default three-digit waypoint name/number (001), symbol (dot), and position. You can leave the name as the auto-assigned number, but for this exercise, lets change the name to ‘DOCK’. 2. Use the ARROW KEYPAD to highlight the waypoint name field (001) and press ENTER/MARK. You will see that just the first ‘0’ is now highlighted.
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. We’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. Getting Started Using the NAV/MOB Key The NAV/MOB key is the primary tool used to select a destination waypoint, TracBack, or a route to navigate.
Getting Started Let’s give it a try by activating the practice route stored in memory for navigation: Simulated Tour 1. Press NAV/MOB. The options list will appear. (If we were selecting a single waypoint to navigate to rather than a route, we could highlight the waypoint on the map, press NAV/MOB and then press ENTER/MARK.) 2. Use the ARROW KEYPAD to highlight the ‘Follow Route’ option. Press ENTER/MARK to confirm. 3. The Select Route page will appear, with the ‘GPSMAP TOUR’ route highlighted. 4.
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 field will display ‘overzoom’ or ‘NO MAP’ to indicate that you should exercise extreme caution using the map data. Press the IN key to zoom into the 2 nm scale.
Getting Started Sonar Page Data Fields Adjustment Bar Depth Line Fish Arch Bottom Depth Scale Whiteline Flasher Thermocline Sonar Page The Sonar Page lets you use the GPSMAP 168 Sounder as a fishfinder. The top of the screen contains any of 27 selectable data field 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 transducer.
Another useful feature of the GPSMAP 168 Sounder is the sonar zoom, which allows you to instantly “zoom in” to look at a specific portion of the sounder display by using the either the IN or OUT key. The Zoom function is divided into four display levels: Getting Started • 2X Split––Shows two reduced-size sonar pictures at the same time. The right half of the display screen shows the complete sonar picture at its original scale. The left half shows a portion of the original picture at 1/2 depth scale.
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. Getting Started Compass/Highway Navigation Pages Data Fields Current Destination The GPSMAP 168 Sounder features two different navigation pages: Compass and Highway. The Compass Page is first.
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 screen provides visual guidance to your waypoint on a moving graphic “highway.” Your present position is at the bottom center of the highway display. The line down the middle of the highway represents your desired course. As you navigate toward a waypoint, the highway will actually move—indicating the direction you’re off course.
Getting Started Data Fields/Active Route Page/ Main Menu Page You may choose from 27 different types of data. Submenu Tabs Menu Tabs The main pages’ (except the Status and Active Route Pages) data fields may also be configured to display any of 27 different information categories (see page 36-37 for the complete list). On the Highway Page, let’s change the ‘TO COURSE’ field to ‘TURN’. To change a data field: 1. Press the MENU key to display the Highway Page options. 2.
To 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. To select the Track submenu tab: 1. Use the ARROW KEYPAD to highlight the ‘Track’ menu tab. You will see the options for the Track tab appear to the right of the Main Menu list. Getting Started Deleting Track Logs/ Powering Off Unit 2. Press to the right one time on the ARROW KEYPAD and you will see ‘Active’ highlighted.
Status Page Reference Status Page Signal Strength Bars Receiver Status Accuracy Sky View DOP DGPS Status Date Time Position Coordinates Ready for use Collecting data The GPSMAP 168 Sounder Status Page provides a visual reference 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.
Receiver Status, Accuracy and DOP Receiver status is indicated at the top field 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). Accuracy uses DOP and other factors to calculate horizontal position accuracy in feet or meters.
The ‘DGPS Rcvr’ and ‘Diff SNR’ fields appear below the ‘Accuracy’ and ‘DOP’ fields.
The following options are available: • Start/Stop Simulator— allows you put the unit in simulator mode. See the Getting Started Tour for more on using simulator mode. • Enable/Disable WAAS— allows you to activate or deactivate WAAS. ‘WAAS’ is an acronym for “Wide Area Augmentation System’. You can use the WAAS capability to increase the accuracy of the GPSMAP 168 Sounder. When enabled, the GPS receiver searches for a WAAS satellite, then receives data that will help correct differentials in the GPS signal.
Map Page Reference Map Page Data Fields Land User Waypoint Map Item Boat Icon Water Navaid Geographic Name Map Scale The GPSMAP 168 Sounder’s Map Page provides a comprehensive display of electronic cartography, plotting and navigational data. When using the unit with the optional MapSource software, the map display shows your boat on a digital chart, complete with geographic names, map items, navaids and a host of other chart features.
When the ARROW KEYPAD 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 KEYPAD. • 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 the map scrolling and may go off the display screen (you may not be able to see your present position).
To hide the cursor and re-center your position on screen: Reference 1. Press the QUIT key. To select an on-screen waypoint or map item with the cursor: Map Page Cursor 1. Use the ARROW KEYPAD to move the cursor to the desired waypoint or map item (if there are several waypoints grouped closely together, zoom in for a closer view). 2. When a waypoint or map item is selected, it will become highlighted on the screen with the name and position displayed.
With 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. Fishing Hot Spots data provides detailed information in tabbed format such as shoreline, depth contours, submerged objects, swimming areas, navigational aids, mile markers, boat ramps, marinas, facilities, lake profiles and fishing areas.
To view information about a waypoint: Reference Map Page Cursor 1. Use the ARROW KEYPAD to select a waypoint with the cursor and press ENTER/MARK. The Waypoint Review page will appear. If the waypoint is located on a map feature (road, intersection, city, lake, etc.), details about each map feature at that location will be displayed in a tabbed format behind the Waypoint Review Page. 2.
3. To change the waypoint symbol, name or position coordinates, or enter a depth, use the ARROW KEYPAD to select the desired field, then press ENTER/MARK. Make your changes and press ENTER/MARK again to accept the changes. Reference 4. When you are finished making changes, or to accept the waypoint using the default 3-digit name and symbol, highlight the ‘OK’ button and press ENTER/MARK to save the new waypoint. Map Page Cursor and Zooming For more information, see “Creating Waypoints” on page 48.
Map Page Options Reference 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 preferences and/or select special features that specifically 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.
• Measure Distance— allows you to measure the bearing and distance between any two points on the map display. Reference To measure the BRG/DIS between two points: Map Page Options 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’ below it. 2. Move the cursor to the desired reference point (the point that you want to measure from) and press ENTER/MARK. 3.
• 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. You may adjust the size of the Sonar/Flasher window anywhere from 1/3 to 1/2 width of the right half of the Map Page. Reference To resize the Map Page split screen: Map Page Options 1. From the Map Page and Sonar/Flasher split screen, press MENU. 2. Using the ARROW KEYPAD, highlight ‘Resize Map’ and press ENTER/MARK. New Size 3.
To change a map setup feature: 1. From the Map Page menu, highlight ‘Configure Map’ and press ENTER/MARK. 2. Move LEFT or RIGHT on the ARROW KEYPAD to highlight the desired tab, then UP or DOWN on the ARROW KEYPAD to highlight to the setting you want to change and press ENTER/MARK. 3. Move UP or DOWN on the ARROW KEYPAD to highlight to the desired setting and press ENTER/MARK. 4. To exit, press QUIT.
Reference Map Page Options Waypoints Tab Nav Line Tab Points Tab Track Tab Waypoints Tab— Waypoints, Active Route Text and Zoom settngs, see the description on page 33 for details. Points Tab— Spot Soundings, Tide Stations. Services, Navaids Text and Zoom settings, see the description on page 33 for details. Nav Line Tab Heading Line— On/Off: turns the Heading Line on or off. The Heading Line projects from the triangle showing your current heading.
Map Setup Menu Options From the map setup page, you can access the following menu options: • Restore Defaults— restores settings back to factory settings for the tab highlighted. • Restore All Map Defaults— restores settings back to factory settings for all tabs. Reference Map Page Options • MapSource Info— allows you to display/not display optional map sets loaded in the unit. To restore defaults for map settings: 1.
To change the page layout: Reference Map Page Options 1. From the menu, use the ARROW KEYPAD to highlight the ‘Setup Page Layout’ option and press ENTER/MARK. 2. Move up or down on the ARROW KEYPAD to highlight to the desired setting and press ENTER/MARK. To exit, press QUIT. • Change Data Fields — allows you to specify the type of data displayed in each data field used on the map display.
Data Field Options continued • TO COURSE – Distance to desired track • TRACK – Current compass heading • TRIP ODOM – Trip Odometer • TTL AVG SPEED – Total average speed • TTL TRIP TIMER – Total travel time of trip, stopped and moving • TURN – Turn angle to waypoint • VMG – Velocity Made Good to destination • WATER SPEED – Speed through the water (only available with additional sonar NMEA data) • WATER TEMP – Water temperature (only available with additional sonar NMEA data) Reference Map Page Options To c
Sonar Page Reference Sonar Page Data Fields Adjustment Bar Depth Line Fish Arch Bottom Depth Scale Whiteline Flasher Thermocline Sonar Page The Sonar Page is where your GPSMAP 168 Sounder becomes a powerful fishfinder/flasher. The top of the screen contains data fields which can display any of 27 selectable data field options, while the Adjustment Bar below the data fields allows direct access to the settings most commonly changed while using the Sonar Page.
2. With the ARROW KEYPAD, move UP or DOWN and place the pointer or adjustment bar at the desired setting or range. Reference 3. To change ‘View’ to ‘Auto’ or ‘Line’ to ‘Off’, hold UP or DOWN on the ARROW KEYPAD until the adjustment bar reaches the top or bottom of the scale, release, then press once more in the same direction. Sonar Page 4. You may press QUIT or ENTER/MARK to accept the setting and return to the Sonar Page.
Sonar Page Options Reference 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 field options. To display the Sonar Page options: 1. Press MENU. To select a menu option: 1. Use the ARROW KEYPAD to highlight the desired option and press ENTER/MARK. Sonar Page Options Menu Use the ARROW KEYPAD to point to an underwater target.
• 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 measure the depth of underwater objects. The depth of the line will appear in a box on the right side of the line. To activate/deactivate the Depth Line from the Sonar Page: Reference Sonar Page Options 1. Press MENU to display the Sonar Page options. 2. Using the ARROW KEYPAD, highlight ‘Show/Hide Depth Line’ and press ENTER/MARK.
Reference Sonar Tab Options • Configure Sonar— contains the unit settings that should not require frequent change. The Sonar setup menu contains settings for Fish Symbols, Whiteline, Scroll Speed, Scale, Noise Reject, Keel Offset, Water Type, Remember, and Calibration. To enter the Sonar setup menu, press the MENU key from the Sonar Page, highlight ‘Configure Sonar’ and press ENTER/MARK. You may also press MENU twice from any screen, then highlight the ‘Sonar’ tab using the ARROW KEYPAD.
• Scale— controls the depth ‘Scale’ displayed vertically along the right side of the chart. The depth ‘Scale’ can be configured to display four different ways: as an ‘Overlay’, in the ‘Corners’, with ‘Basic’ or ‘No Scale’. • Noise Reject— helps filter unwanted noise from the chart. The ‘Noise Reject’ tool can be turned ‘Off’, set to ‘Auto’ (automatically adjusts for optimum viewing) or to a fixed ‘Low’, ‘Medium’ or ‘High’ setting.
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. Note your top speed, then stop the boat and press ENTER/MARK. 3. By default, the top ground speed will automatically show in the ‘What was your top water speed?’ field.
Compass Page The GPSMAP 168 Sounder features two different navigation pages: Compass and Highway. Whenever a NAV/MOB, Follow Track (TracBack) 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 includes a bearing pointer.
Highway Page Reference Whenever a NAV/MOB, TracBack or route has been activated, the GPSMAP 168 Sounder’s Highway Page will provide digital and graphic steering guidance to the destination with the Navigation Page. The top half of the Highway Page features user-selectable data fields that display useful navigation data. The bottom half of the screen provides visual guidance to the waypoint on a graphic highway display. The line down the center of the highway represents your desired track line.
The following options are available from the Highway Page menu: Reference • Show/Hide Tracks— toggles the display of track lines on/off. • Configure Highway— allows you to select what waypoints are shown on the Highway display. Four options are available: Highway Page Options • Rte & Nearest— all route and nearest waypoints displayed. • Route Only— only waypoints in the route will be displayed. • Active Only— only the active waypoint will be displayed. • Hide All— no waypoints will be displayed.
Reference Creating Waypoints Creating and Using Waypoints The GARMIN GPSMAP 168 Sounder stores up to 500 alphanumeric waypoints with a user-defined 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.
5. To enter an optional depth, highlight the “Depth” field to the right of the position coordinates and press the ENTER/MARK key, then use the ARROW KEYPAD to enter a value and press ENTER/MARK. 6. When done, use the ARROW KEYPAD to highlight the ‘OK’ prompt and press ENTER/MARK to save the waypoint into memory. Reference Creating Waypoints Creating Waypoints Graphically Waypoints may also be quickly created using the map display.
Creating Waypoints By Text Entry Reference Waypoints may also be created by manually entering position coordinates through the ‘Waypt’ tab on the main menu page. Creating and Editing Waypoints To create a new waypoint by manually entering its coordinates: 1. Press MENU twice to display the main menu page. Symbol Name Coordinates Depth 2. Highlight the ‘Waypt’ tab and press MENU. Then highlight ‘New Waypoint’ and press ENTER/ MARK.
To 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’ waypoint lists. Press ENTER/MARK to display the Waypoint Edit page. To change the waypoint name: Reference Editing Waypoints 1. Highlight the waypoint name field and press ENTER/MARK. 2. Use the ARROW KEYPAD to enter a new name and press ENTER/MARK when done. To change the waypoint symbol: 1.
Waypoint Submenus Reference Waypoint Options The GPSMAP 168 Sounder’s Main Menu Page features three waypoint submenu tabs, ‘By Name’, ‘Nearest’, and ‘Proximity’, that let you manage a large number of waypoints quickly and efficiently. The submenu tabs also provide a continuously updated nearest waypoints list and a proximity waypoint alarm function that can be used to define an alarm circle around submerged hazards, shallow waters, etc. To access the Main Menu Page/Waypoint (Waypt) submenus: 1.
To display the waypoint menu options: 1. Using the ARROW KEYPAD, highlight the ‘By Name’ tab and press the MENU key. 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’. Reference Waypoint Options 2. Use the ARROW KEYPAD to scroll through the list in the desired direction. 3. Press ENTER/MARK to review the highlighted waypoint on the Waypoint Edit Page. 4. Press ENTER/MARK to return to the list.
Nearest Waypoint List Reference Nearest/Proximity Waypoint Lists The second waypoint submenu list available from the ‘Waypt’ tab is the ‘Nearest’ list, which shows 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 safety in emergency situations. To scroll through and review the nearest waypoint list: 1.
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. • Clear Alarm— removes selected waypoint from proximity list. • Clear All— removes all waypoints from proximity list. Reference Proximity Waypoints To display the proximity waypoint menu options: 1. Using the ARROW KEYPAD, highlight the ‘Proximity’ tab and press the MENU key. To add a proximity waypoint: 1.
To turn proximity alarms on or off: Reference Proximity Alarms 1. Use the ARROW KEYPAD to highlight the field below ‘Proximity Alarm’ and press ENTER/MARK. 2. Select the desired ‘ON’ or ‘OFF’ setting and press ENTER/MARK. To clear one or all proximity waypoint(s) from the list: Proximity Circle Proximity Waypoint 1. Use the ARROW KEYPAD to highlight the proximity waypoint to clear and then press the MENU key. 2. To clear a single alarm, highlight the ‘Clear Alarm’ field and press ENTER/MARK. 3.
To activate a ‘Go To’ from the find list: 1. Press the NAV/MOB key. 2. Use the ARROW KEYPAD to highlight ‘Go To Point’ and press ENTER/MARK. The ‘Find’ list will be displayed. Reference Going to a Destination 3. Select a catagory (i.e. Waypoint, City, Facitilies, Transportation) from the ‘Find’ list, then using the ARROW KEYPAD select a point from that catagory. Press ENTER/MARK to display a review page for the selection, then with the ‘GO TO’ button highlighted, press ENTER/MARK to begin navigation.
TracBack Navigation (Follow Track) Reference TracBack Navigation The second method of navigating to a destination is by using the TracBack feature. The TracBack function allows you to retrace your path using the track log automatically stored in the receiver’s memory, which will eliminate the need to store waypoints along the way. TracBack routes are created by reducing your track log into a route of up to 30 turns and activating an inverted route along those points.
To activate a TracBack using the NAV/MOB key: Reference 1. Press the NAV/MOB key, then highlight the ‘Follow Track’ 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 ‘Reverse’, which will navigate you from the start to the end of your trip and press ENTER/MARK.
MOB Reference MOB: Man OverBoard The GPSMAP 168 Sounder’s Man OverBoard function (MOB) lets you simultaneously mark and set a course to a position for quick response to emergency situations. To activate the MOB function: 1. Press and hold the NAV/MOB key or press the NAV/MOB key twice. 2. Press the ENTER/MARK key to confirm and begin navigating to the MOB position.
Routes The last way to navigate to a destination is to create a user-defined route. The GARMIN GPSMAP 168 Sounder system lets you create and store up to 20 reversible routes, with up to 30 waypoints each. Routes can be created and modified in two ways. The first way is to ‘Edit as Text’ from the Route Review Page, allowing you to see a list of the waypoints as you create, review, or modify the route.
To create a route graphically from the Route Review page: Reference Creating Routes 1. Press the MENU key twice to display the Main Menu page. Use the ARROW KEYPAD 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, highlight ‘Create on Map’ and press ENTER/MARK. 4.
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 route has been created, it can be activated and used for navigation with the NAV/MOB key. A route may be followed in the same sequence as it was originally created, or you can invert the route and navigate from the end waypoint back to the beginning waypoint.
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 Name 2. Highlight the name of the route you wish to review and press ENTER/MARK. Data Fields Route Points The Route Review Page also allows you to enter your own 15-character name for any listed route.
Edit on Map— this option allows you to review and modify the route displayed through a pop-up 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. To edit the route on the map: Reference Editing Routes 1. From the Route Review page options menu, select ‘Edit on Map’ and press ENTER/MARK. To review or modify a route point: 1.
Reference 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. 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. 2.
Invert— The Invert function will reverse the route you choose. This option is available from both the Route Review and Active Route Pages. Reference To invert a route: 1. From the Route Review or Active Route page, press MENU. Editing Routes 2. Using the ARROW KEYPAD, highlight ‘Invert’ and press ENTER/MARK. Plan Route— The Route Review and Active Route pages also display trip-planning information for each leg or the entire route.
Active Route Page Reference 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, 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. The current destination point, the ‘active’ point, is marked with an arrow icon.
Main Menu Page The GPSMAP 168 Sounder’s Main Menu Page provides access to various waypoint, system, navigation 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. Reference Main Menu Tabs See pages 2-3 for additional instructions on changing settings and entering data. To access the Main Menu Page: 1. Press MENU twice.
Reference Main Menu: Track Tab • • • • • • • Sonar— sets up Sonar Page features, speeds and calibrations See pages 42-44. Systm— defines beeper and simulator, restores setup, and displays software version. Units— defines position format, datum, heading, and distance and speed units. Comm— interface settings for use with a PC or second device. Alarm— sets up alarms for anchor drag, arrival, off course, and clock. Celes— Celestial page shows sun/moon time cycles and positions.
• Interval— defines the frequency at which the track plot is recorded. Three interval settings are available: Reference Time— records track plot based on a user-defined time interval. Resolution— records track plot based upon a user-defined variance from your course over ground. The resolution option is the default setting and is recommended for the most efficient use of memory and TracBack performance.
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 ‘Reset Trip’, ‘Reset Odometer’, ‘Reset Max Spd (speed)’, or ‘Reset All’ and pressing ENTER/MARK. Main Menu: Trip, Time and Pages Tabs Time Tab— displays the current time and date, allows you to adjust the 12 or 24 hour time format, enter a time zone and adjust for daylight savings to show correct local time.
Systm (System) Tab— controls system setting for beeper, speed filter, languages, system mode, simulator controls, restores factory settings, and displays software version. The following settings are available: • Beeper— controls audible beep. Select from ‘Off’, ‘Alarms Only’ (sounds for alarms/messages), ‘Key and Alarm’ (sounds for key presses and alarms/messages). Reference Main Menu: Systm (System) Tab • Speed Filter— averages speed-readings.
Reference Main Menu: Units Tab , The Units tab settings will affect how navigation information is displayed on the GPSMAP 168 Sounder. When in doubt, seek assistance. If you are using a map or chart in conjunction with your GPS, make sure the settings under the ‘Units’ tab of the GPSMAP 168 Sounder match that of the map or chart. This information should be displayed somewhere on the map or chart.
• 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 based upon a true north reference. ‘Grid’ provides headings based on a grid north reference (and is used in conjunction with the grid position formats described on page 74).
Reference Main Menu: Comm Tab Data Transfer Progress Comm Tab Serial Data Formats 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.
If ‘GARMIN DGPS’ or ‘RTCM In/NMEA Out’ format is selected, additional fields are provided to control a GARMIN differential beacon receiver directly from your GPSMAP 168. You may have the unit automatically scan for the DGPS beacon signal or you can enter the beacon frequency and bit rate on the unit and the information will be used to tune the beacon receiver. To have the unit automatically scan for a frequency: Reference Main Menu: Comm Tab 1.
Reference Main Menu: Alarm Tab The DGPS beacon transmitters are 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 find the most updated list of frequencies and coverage areas, contact your local USCG, or see their web site at http://www.navcen.uscg.mil/.
To set an alarm: 1. Use the ARROW KEYPAD to highlight the field 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 field to the right and press ENTER/MARK, then enter the desired settings and press ENTER/MARK to finish. , Reference Main Menu: Alarm Tab In order to hear an audible alarm, you must have the beeper turned on (page 73 ).
Reference Main Menu: Celes (Celestial) Tab 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 portion of the moon as a light color. You may display this data for your current position, a position from the map, or a waypoint location. Also, you may select a different date and time, or use the current data. To choose a position: Date Time 1.
Tide Tab— shows a graphical chart which displays tide station information in a 24 hour span starting 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. Reference Main Menu: Tide Tab The top of the page displays the tide station being referenced, below that the date.
Reference Main Menu: Tide Tab The name of the Tide Station nearest to your current location will appear in the ‘For’ field. You 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’ field. To search for a Tide Station, highlight the ‘For’ field and press ENTER. If no Tide Stations are found, pressing the MENU key will display the search options, ‘Nearest To Boat’, ‘Nearest To Other’.
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 acronym for “LOng RAnge Navigation.” The Loran system covers the entire United States and the U.S. Coastal Confluence Zone. From the perspective of a mariner, the system is used for ocean and coastal navigation. It can be used as a supplemental system for harbor and harbor approach navigation, and it is used for inland navigation by recreational vehicles.
Appendix A Loran TD , When inputting Loran coordinates, you must have the correct chain number, secondary station identifiers (first and second), and proper map datum available for the TD 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. To setup Loran TD from the Main Menu: 1. Using the ARROW KEYPAD, highlight the ‘Units’ tab and then the ‘Position Format’ field and press ENTER/MARK. 2.
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, add one hour to the offset. Longitudinal Zone Offset Longitudinal Zone Offset W180.0º to W172.5º -12 E007.5º to E022.5º +1 W172.5º to W157.5º -11 E022.5º to E037.5º +2 W157.5º to W142.5º -10 E037.5º to E052.5º +3 W142.5º to W127.5º -9 E052.5º to E067.5º +4 W127.5º to W112.5º -8 E067.
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 Voltage Set Too High Set to 16.0V— Voltage range must be between 10.0 and 16.0 volts. Adjust setting. Alarm Voltage Set Too Low Set to 10.0V— Voltage range must be between 10.0 and 16.0 volts. Adjust setting.
Proximity Alarm List is Full— You have used all ten proximity waypoints. Proximity Alarm Waypoint— You have entered the alarm radius for the proximity waypoint indicated. Proximity Overlaps Another Proximity Waypoint—The alarm radius specified overlaps the area specified for another proximity waypoint. Adjust the distance. Route Already Exists: — You have entered a route name that already exists in memory. Modify the route name or delete the previous route name.
Appendix D Map Datums ) The GPSMAP’s built-in world-wide database includes coverage down to 20 n.m. (30 km). Note that the GPSMAP 168 Sounder basemap is valid to 75º north and 60º south of latitude. ) The ‘User’ datum is based on a WGS-84-Local datum and is an advanced feature for unlisted or custom datums. Check your local library or on the world wide web for educational materials on datums and coordinate systems. 88 168 Manual Part 2.
Liberia 1964 Liberia 1964- Liberia Nhrwn Masirah Luzon Mindanao Luzon- Mindanao Island Nhrwn Saudi A Nahrwn- Masirah Island (Oman) Nahrwn- Saudi Arabia Luzon Philippine Luzon- Philippines (excluding Mindanao Isl.) Nhrwn United A Nahrwn- United Arab Emirates Obsrvtorio ‘66 Mahe 1971 Mahe 1971- Mahe Island Observatorio 1966- Corvo and Flores Islands (Azores) Old Egyptian- Egypt Appendix D Map Datums Marco Astro Marco Astro- Salvage Isl.
Appendix E Navigation Terms Altitude— Height above mean sea level (MSL). Avg Speed— The average of all second-by-second speed readings since last reset. Bearing (BRG)— The compass direction from your present position to a destination waypoint. Course— The desired course between the active ‘from’ and ‘to’ waypoints. Distance (Dist)— The ‘great circle’ distance from present position to a destination waypoint.
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— The current velocity at which you are travelling, relative to a ground position. Also referred to as ‘ground speed’. Time To— The estimated time required to reach a GOTO destination or the next waypoint in a route. Also referred to as ‘estimated time en route’.
Appendix F Specifications Physical Specifications Size: 4.63" H x 6.0" W x 2.75" D (11.7cm x 15.2cm x 7cm) Weight: 1 lb. 6 oz. (.763 kg) Display: 4.2" diagonal (10.
Installing the GPSMAP 168 Sounder The GPSMAP 168 Sounder must be properly installed according 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 unit’s purchased with the external GA 29 antenna (010-00199-00), follow the instructions below.
Mounting the GPSMAP 168 Sounder Unit Appendix G The GPSMAP 168 Sounder’s compact, waterproof case is suitable for mounting in exposed locations 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 conditions: Unit Installation • There should be at least a 3” (5 cm) clearance behind the case to allow connection of the antenna (external antenna only) and power/data cables.
Connecting the Power/Data Appendix G Wiring and Interfacing 10-18 Volt Boat Supply If your boat has an electrical system, it may be possible to wire the unit directly to + an unused holder on your Install current fuse block. If you are 2-Amp Fuse using the boat’s fuse block, remove the in-line fuse holder supplied with the unit. If your boat does not have a fuse block, the unit can be Boat wired directly to the battery. Ground Make sure the 2-Amp in-line fuse supplied with the unit is Black Wire installed.
Transducers Appendix G Selecting A Transducer Wide cone angle Narrow cone angle dead zone fish not seen X X 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 toward the bottom in a cone shape. The larger the cone angle, the larger the coverage area at a given depth.
Proper transducer installation is key to getting the best performance from your new unit. If the 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 spliced and connected to any existing (GARMIN or non-GARMIN) transducer cables. Appendix G Mounting the Transducer Following are some tips and basic installation instructions for three popular transducers.
Appendix G Mounting the Transducer PVC Pipe or a Can Weight transducer to hold it in place Fill Pipe or Can with water or a light mineral oil Strip Caulk or RTV Sealer Hull Surface Shoot Thru-Hull Installation The in-hull transducer is designed to be mounted inside a fiberglass hull. The standard plastic transom mount transducer can also be mounted in this fashion using this method. If using a temperature sensing transducer, the temperature displayed will reflect the hull temperature.
Trolling Motor Installation Appendix G Included in theTrolling Motor transducer kit you should have: 1. Worm Gear Clamp 2. Cable Ties Mounting the Transducer 3. Transducer Mounting the Transducer: 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. Cable Ties 3. Place the free end of the clamp band into the worm gear and tighten until the band is through the worm gear. 4.
Testing the Installation Appendix G Testing 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 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.
The Portable Case The Portable Case is designed for rugged use and provides storage for the Battery Pack, the Portable 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 float in the event it should go overboard.
Appendix G GPSMAP 168 Sounder Portable When storing the Suction Cup Transducer in the case, dry the transducer and cable to avoid corrosion. If using in Salt Water, 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 Alkaline batteries will provide approximately 20 hours of continuous operation.
Understanding Sonar Appendix H 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 fishing productivity. To understand what the unit is displaying, it is important to have a general knowledge of how the unit works and how it determines what to display.
Transducer Coverage Appendix H 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 approximately a 10-foot diameter circle. The scale below illustrates how coverage increases as depth increases.
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 where the return originated– only when it was received. Appendix H Understanding the Chart Example 2 provides a look at the underwater world from a top view, and relates that view to what would be displayed on the chart.
Whiteline Appendix H Understanding the Chart ) Whiteline can also help you to determine the type of bottom structure that is displayed on the chart. By determining the hardness of the structure, you can make a better informed decision on the type of structure. Structure is hard— probably a rock or stump Structure is soft— probably a mud pile The GPSMAP 168 Sounder can help you to determine if the bottom is hard or soft.
Thermoclines One of the unique features offered by GARMIN is See-Thru technology. See-Thru technology allows the GPSMAP 168 Sounder to see through thermoclines and helps locate fish where they live; and fish love the thermocline. + Appendix H Understanding the Chart A rough definition of a thermocline is a break in water where the water temperature changes faster than the water above it. The thermocline usually displays as a gray level as shown below. Thermocline 107 168 Manual Part 2.
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 are activated the unit may take longer than 2 seconds to update. Activating the NMEA Data: 1. With the GPSMAP 168 Sounder turned on, press the MENU key twice to display the Main Menu.
A D Accessories ......................................viii, 96 Accuracy ................................................21 Accuracy Circle ......................................34 Active Route Page .............................47, 68 Active Route Page Options .....................68 Adjustment Bar ...........................14, 38-39 Alarms ..............................................78-79 Anchor Drag Alarm ................................78 Arrival Alarm .........................................
Appendix J Index J Jump To Page .......................................72 K Keel Offset ...........................................43 Keypad Usage .......................................1 L Land Mode ..........................................33 Language Selection ..............................73 Layout ...........................................35-36 Loran TD ........................................83-84 M Magnetic Variation ..............................75 Main Menu .....................................
Routes- Inverting ...................................67 Routes- Naming .....................................64 Routes- Plan Route .................................67 Routes- Removing Points .................65,66 Routes- Reviewing Points .................64,65 S Satellite Sky View ...............................5, 20 Scroll Speed ..........................................42 Serial Data Format .................................76 Serial Number .........................................iv Shallow Water Alarm .
© 2000 - 2002 GARMIN Corporation GARMIN International, Inc. 1200 East 151st Street, Olathe, Kansas 66062, U.S.A. GARMIN (Europe) Ltd. Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9AQ, U.K. GARMIN Corporation No. 68, Jangshu 2nd Road, Shijr, Taipei County, Taiwan www.garmin.com Part Number 190-00170-00 Rev. D 168 color cover.
