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Garmin GPSMAP 188C Owner's Manual

Manual is about: chartplotting receiver & depth-finder

Summary of GPSMAP 188C

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    Gpsmap ® 188/188c sounder chartplotting receiver owner’s manual (gpsmap 188c shown).

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    © copyright 2005 garmin ltd. Or its subsidiaries garmin international, inc. 1200 east 151 st 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 9dl, u.K. Tel. 44/0870.8501241 ...

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    Gpsmap 188/188c sounder owner’s manual i i ntroduction > a bout t his m anual i ntroduction thank you for choosing the garmin ® gpsmap ® 188/188c sounder. Take a moment now to compare the contents of this package with the packing list on the outside of the box. If any pieces are missing, contact you...

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    Ii gpsmap 188/188c sounder owner’s manual i ntroduction > t able of c ontents table of contents introduction ...........................................................................I about this manual ................................................................... I care information ............

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    Gpsmap 188/188c sounder owner’s manual iii i ntroduction > t able of c ontents pages tab ............................................................................... 63 map tab .................................................................................. 64 general sub tab .....................

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    Iv gpsmap 188/188c sounder owner’s manual i ntroduction > c are i nformation care information cleaning the unit the gpsmap 188/188c sounder is constructed of high quality materials and does not require user maintenance other than cleaning. Clean the unit using a cloth dampened with a mild detergent ...

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    Gpsmap 188/188c sounder owner’s manual 1 b asic o peration > i nitializing the r eceiver b asic o peration initializing the receiver the first time you turn on the gpsmap 188/188c sounder, the receiver must be given an opportunity to collect satellite data and establish its present location. To ensur...

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    2 gpsmap 188/188c sounder owner’s manual b asic o peration > i nitializing the r eceiver to graphically initialize the gpsmap 188/188c sounder: 1. Press menu twice for the main menu. Press up or down on the rocker until the gps tab is highlighted, and then press menu once. 2. Using the rocker, highl...

  • Page 9

    Gpsmap 188/188c sounder owner’s manual 3 b asic o peration > s imulator m ode simulator mode simulator mode turns the gps receiver off for use indoors or practice. Any of the functions discussed in the following pages can be performed in simulator mode. While in simulator mode, a “running simulator”...

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    4 gpsmap 188/188c sounder owner’s manual b asic o peration > a djusting the b acklight the set position, track control, track and speed fields only show while in simulator mode. To enter a simulated speed and heading from the main menu: 1. Press menu twice to display the main menu. 2. Use the rocker ...

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    Gpsmap 188/188c sounder owner’s manual 5 b asic o peration > i nterface k eys interface keys nav key • press and release at any time to view the navigation menu. Quit key • press and release to cancel data entry or exit a page. Rocker key • press up/down or right/left to move through lists, highligh...

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    6 gpsmap 188/188c sounder owner’s manual b asic o peration > e ntering d ata and s electing o ptions entering data and selecting options you can select and start options, and enter data to customize the gpsmap 188/188c sounder to fit your requirements. Use the enter key and the rocker to select optio...

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    Gpsmap 188/188c sounder owner’s manual 7 b asic o peration > u sing the m ap p ointer using the map pointer working from the map page centers around the use of the pointer. Controlled by the rocker, the pointer is used to pan to map locations, mark and edit waypoints and routes, and review position ...

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    8 gpsmap 188/188c sounder owner’s manual b asic o peration > c reating and u sing w aypoints creating and using waypoints the garmin gpsmap 188/188c sounder stores up to 3,000 alphanumeric waypoints with a user-defined symbol, comments, and depth available for each waypoint. Waypoints can be created ...

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    Gpsmap 188/188c sounder owner’s manual 9 b asic o peration > c reating and u sing w aypoints 5. To enter optional comments or a depth, highlight the comments or depth field to the right of the location coordinates, and press enter, use the rocker to enter a value, and press enter. 6. To manually ente...

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    10 gpsmap 188/188c sounder owner’s manual b asic o peration > m an o ver b oard (mob) man overboard (mob) the gpsmap 188/188c sounder’s man overboard (mob) function simultaneously marks and sets a course back to the marked location for quick response to emergency situations. The mob function allows ...

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    Gpsmap 188/188c sounder owner’s manual 11 b asic o peration > r eviewing and e diting w aypoints reviewing and editing waypoints waypoints are reviewed, modified, renamed, moved, or deleted at any time through the waypoint edit page. The waypoint edit page is available for any stored waypoint. Select...

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    12 gpsmap 188/188c sounder owner’s manual b asic o peration > n avigating to a d estination to change the waypoint symbol: 1. Highlight the waypoint symbol field to the left of the waypoint name, and press enter. 2. Use the rocker to select a new symbol, and press enter. To change the comment, locati...

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    Gpsmap 188/188c sounder owner’s manual 13 b asic o peration > n avigating to a d estination to activate a go to from a point list: 1. Press the nav key. Highlight go to point, and press enter. 2. From the find menu, highlight waypoints or another menu option, and press enter. 3. To select a waypoint...

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    14 gpsmap 188/188c sounder owner’s manual b asic o peration > n avigating to a d estination to go to a new map point (non-map item): 1. Use the rocker to move the map pointer to the location you want. 2. Press nav. 3. With go to map point highlighted, press enter. Tracback navigation (navigating a t...

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    Gpsmap 188/188c sounder owner’s manual 15 b asic o peration > n avigating to a d estination to clear the track log and define a starting point for a tracback route: 1. Press menu twice to display the main menu. 2. Using the rocker, highlight the track tab, and highlight the active sub tab. 3. Use the...

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    16 gpsmap 188/188c sounder owner’s manual b asic o peration > n avigating to a d estination to activate a tracback using the nav key: 1. Press nav, highlight the follow track, and press enter. 2. Highlight the track you want to follow, and press enter. 3. Choose original to navigate from the start t...

  • Page 23

    Gpsmap 188/188c sounder owner’s manual 17 b asic o peration > r outes routes you can create and store up to 50 user-defined reversible routes (numbered 1-50), with up to 254 waypoints each. Routes are created and modified in two ways. The first method creates the route using a map page. This method sel...

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    18 gpsmap 188/188c sounder owner’s manual b asic o peration > r outes 6. Repeat steps 4 and 5 until you have finished defining all route waypoints. 7. When finished, press quit twice to return to the route list. Highlight edit as text, and press enter to return to the route review page. Add appears bel...

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    Gpsmap 188/188c sounder owner’s manual 19 b asic o peration > f ind 6. From the find menu, highlight waypoints or another menu item, and press enter. From either the by name or nearest tab lists, choose a waypoint, and press enter. (see page 50 for searching for waypoints by name.) 7. On the waypoin...

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    20 gpsmap 188/188c sounder owner’s manual b asic o peration > f ind to find an item from your current location: 1. From any page, press find. 2. Using the rocker, highlight a category from the list, and press enter. 3. For waypoints and cities, search using by name or nearest. Use the rocker to high...

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    Gpsmap 188/188c sounder owner’s manual 21 b asic o peration > a dditional i nformation to find an item using the find options: 1 from any page, press find. 2. Using the rocker, highlight a category from the list, and press enter. 3 from the search results list, press menu, highlight an option, and p...

  • Page 28

    22 gpsmap 188/188c sounder owner’s manual b asic o peration > dsc dsc the dsc tab on main menu controls and sets up the digital selective calling (dsc) features on the gpsmap 188/188c sounder. Dsc uses marine vhf radio and global positioning system (gps) technologies to transmit and receive location...

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    Gpsmap 188/188c sounder owner’s manual 23 b asic o peration > dsc understanding position reports a position report is similar to a distress call except no alarm is sounded. Position reports are not broadcast to all dsc users and are shown with a boat symbol. Receiving dsc calls each time you receive...

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    24 gpsmap 188/188c sounder owner’s manual b asic o peration > dsc dsc call list the dsc call list displays the 50 most recent calls, even if the unit is left unattended. The call list displays the most recent call from a vessel. If a second call from the same vessel is received, it replaces the first...

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    Gpsmap 188/188c sounder owner’s manual 25 b asic o peration > dsc navigating to a position report or distress call after a position report or a distress call is received, navigation can be quickly set to the call location. To navigate to position report or distress call: 1 press nav. 2. With go to m...

  • Page 32

    26 gpsmap 188/188c sounder owner’s manual m ain p ages > o verview m ain p ages six main display pages are always available: map page, sonar page, pointer page, numbers page, highway page, and active route page. You can cycle through these pages by pressing either page or quit. For information on th...

  • Page 33

    Gpsmap 188/188c sounder owner’s manual 27 m ain p ages > m ap p age map page the map page provides a comprehensive display of electronic cartography, plotting, and navigational data. When in the bluechart data coverage area or using optional mapsource software, the map display shows your boat on a d...

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    28 gpsmap 188/188c sounder owner’s manual m ain p ages > m ap p age using the map pointer the pointer pans away from your present location (even outside of your current detail coverage.) as you pan past the edge of the current map display, the screen actively scrolls forward to provide continuous ma...

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    Gpsmap 188/188c sounder owner’s manual 29 m ain p ages > m ap p age use the pointer to create new waypoints directly from the map. To create a waypoint with the pointer: 1. Use the rocker to move the pointer to the map location. 2. Press enter. The new map waypoint window appears. (if the pointer is...

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    30 gpsmap 188/188c sounder owner’s manual m ain p ages > m ap p age the gpsmap 188/188c sounder’s system has a built-in worldwide database to 20 mi, with more detailed coverage available through the use of the optional bluechart or mapsource data. The gpsmap 188/188c sounder displays cartography as ...

  • Page 37

    Gpsmap 188/188c sounder owner’s manual 31 m ain p ages > m ap p age map page options full screen map/show data—toggles between the map page without or with data fields on the map display. To maximize the map/show data fields: 1. Highlight full screen map, and press enter. The map page is now maximized...

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    32 gpsmap 188/188c sounder owner’s manual m ain p ages > m ap p age you can also merge the four medium default data fields to a single, large field for better readability or you can split any or all of the default data fields to show four small data fields. Single, large data field default, medium fields ...

  • Page 39

    Gpsmap 188/188c sounder owner’s manual 33 m ain p ages > p ointer p age set up map—configures the map display preferences, including map detail, map orientation, automatic zoom, and various map items and points. Refer to “main menu—map tab” on page 64 for more information. To change a map setup featu...

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    34 gpsmap 188/188c sounder owner’s manual m ain p ages > n umbers p age bearing pointer compass ring data fields current go to destination bearing bug the pointer page features a menu page that provides access to layout and data field options. The data window, located at the top of the page, provides...

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    Gpsmap 188/188c sounder owner’s manual 35 m ain p ages > h ighway p age numbers page shown with middle data field split into four fields to split the data fields: 1. Press menu, and press enter. 2. Highlight a data field, and press menu. 3. Highlight split numbers, and press enter. Four new data fields a...

  • Page 42

    36 gpsmap 188/188c sounder owner’s manual m ain p ages > h ighway p age the four data fields at the top of the page provide additional user-selectable guidance information. Additionally, a compass ribbon shows your current heading along with a dark vertical bar that indicates the direct bearing to th...

  • Page 43

    Gpsmap 188/188c sounder owner’s manual 37 m ain p ages > a ctive r oute p age preview window highway page set up check or uncheck the options you want to show/hide on the highway page. The following options are available from the highway page menu: set up highway—selects what waypoints and tracks ar...

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    38 gpsmap 188/188c sounder owner’s manual m ain p ages > a ctive r oute p age active route page options the following options are available from the active route page: • hide/show numbers—see page 31 for instructions (same as map page option). • change numbers—see page 31 for instructions. • edit on...

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    Gpsmap 188/188c sounder owner’s manual 39 m ain m enu > gps t ab m ain m enu the main menu provides access to various waypoint, system, navigation, interface management, and setup menus. The 19 menu tabs are divided into categories by function. The main menu is available from any page in the system,...

  • Page 46

    40 gpsmap 188/188c sounder owner’s manual m ain m enu > gps t ab the progress of satellite acquisition is shown in three stages: • no signal strength bars—the receiver is looking for the satellites indicated. • light signal strength bars—the receiver has found the satellite(s) and is collecting data...

  • Page 47

    Gpsmap 188/188c sounder owner’s manual 41 m ain m enu > gps t ab ocean, in a geo-stationary orbit over the equator. Effective use of the waas satellite signal can be limited by your geographic location in relation to those satellites, now in developmental service. Waas satellite signal reception req...

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    42 gpsmap 188/188c sounder owner’s manual m ain m enu > gps t ab • autolocate—the receiver is looking for any satellite whose almanac has been collected. This process can take up to five minutes. • acquiring satellites—the receiver is looking for and collecting data from satellites visible at its las...

  • Page 49

    Gpsmap 188/188c sounder owner’s manual 43 m ain m enu > t ide t ab gps tab options the gps tab features an options page that provides access to functions and features relating to the gps info display. To display and select the gps tab options: 1. Press menu. 2. Using the rocker, highlight an option,...

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    44 gpsmap 188/188c sounder owner’s manual m ain m enu > t ide t ab in 4-hour increments, and the light, dotted vertical lines are in 1-hour increments. A solid vertical line (with the current time box at the top) indicates the time of day when using current date and intersects the tide graph to show...

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    Gpsmap 188/188c sounder owner’s manual 45 m ain m enu > t ide t ab you can automatically search for the nearest station using a variety of search locations. You must select a location within 100 nm of a tide station. If you are not within this range, you see a message “none found.” use the nearest t...

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    46 gpsmap 188/188c sounder owner’s manual m ain m enu > t rip t ab move the time bar on the tide chart in 5 minute increments to show tide heights at various times on the chart. To see tide heights at various times on the chart: 1. Press menu, highlight move cursor, and press enter. 2. Press left or...

  • Page 53

    Gpsmap 188/188c sounder owner’s manual 47 m ain m enu > c eles t ab celes (celestial) tab the celestial tab displays celestial data for sun and moon rise/set, moon phase, and approximate sky view location of the sun and moon. The moon phase displays the current visible portion of the moon as a light...

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    48 gpsmap 188/188c sounder owner’s manual m ain m enu > p oints t ab celestial tab menu to change the time or date: 1. From the celes tab, use the rocker to highlight the date or time, and press enter. 2. Enter a new date or time, and press enter. To use current date and time: from the celes tab, pr...

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    Gpsmap 188/188c sounder owner’s manual 49 m ain m enu > p oints t ab to select the points (waypoint) sub tab: 1. Use the rocker to highlight the points tab. A list of stored waypoints appear to the right of the main menu list. 2. Press right one time on the rocker. The user tab is now highlighted. 3...

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    50 gpsmap 188/188c sounder owner’s manual m ain m enu > p oints t ab to display the waypoint menu options: using the rocker, highlight the user tab, and press menu. To scroll through and review the waypoint list: 1. With the rocker, highlight the points tab from the main menu, and then highlight use...

  • Page 57

    Gpsmap 188/188c sounder owner’s manual 51 m ain m enu > p oints t ab to delete waypoints by symbol: 1. From the user sub tab, highlight the waypoint to delete, and press menu. Select delete by symbol, and press enter. 2. Use the rocker to highlight the symbol of the waypoint(s) to delete, and press ...

  • Page 58

    52 gpsmap 188/188c sounder owner’s manual m ain m enu > p oints t ab to add a proximity waypoint: 1. Use the rocker to highlight an empty space on the proximity list, and press enter. The find screen appears. Highlight waypoints, and press enter. 2. To select a waypoint from the list, use the rocker...

  • Page 59

    Gpsmap 188/188c sounder owner’s manual 53 m ain m enu > r outes t ab routes tab the route list page displays all the routes currently stored in memory, along with a descriptive name for each route. After a route has been created, it can be activated and used for navigation with the nav key. A route ...

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    54 gpsmap 188/188c sounder owner’s manual m ain m enu > r outes t ab route review page after you create a route, use the route review page to review and modify the route displayed. To show the route review page: 1. Press menu twice, and highlight the route tab. 2. Highlight the route you want to rev...

  • Page 61

    Gpsmap 188/188c sounder owner’s manual 55 m ain m enu > r outes t ab when you are on the route review page, you can review the route points (waypoints or map items) one at a time from the list. To review individual route points: 1. Highlight a point, and press enter. 2. On the waypoint review window...

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    56 gpsmap 188/188c sounder owner’s manual m ain m enu > r outes t ab edit on map—allows you to review and modify the route displayed for each point (waypoint or map item) on a map page. Use the pointer to insert a new route point on a route leg, review the waypoint, or map item. To edit the route on...

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    Gpsmap 188/188c sounder owner’s manual 57 m ain m enu > r outes t ab add before—inserts a waypoint into the list of route points or add a point(s) onto the end of the route. To insert a point into the route, or add a point to the end of the route: 1. From either the route review or active route page...

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    58 gpsmap 188/188c sounder owner’s manual m ain m enu > r outes t ab trip planning—the route review and active route pages also display trip-planning information for each leg or the entire route. Available information includes course, eta, fuel (to point), leg distance, leg fuel, leg time, sunrise a...

  • Page 65

    Gpsmap 188/188c sounder owner’s manual 59 m ain m enu > t rack t ab track tab the track tab specifies whether or not to record a track log, define how it is recorded, or save track log data for future use. The track logs page also provides an indicator of the memory used for the active track log and o...

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    60 gpsmap 188/188c sounder owner’s manual m ain m enu > t rack t ab for the active sub tab, the following settings are available: record mode—contains three track recording options: • off—the track log is not recorded. Selecting the off setting prevents you from using the tracback feature. • fill—a ...

  • Page 67

    Gpsmap 188/188c sounder owner’s manual 61 m ain m enu > dsc t ab you can use the review on map option to display a saved track on a track map page. To activate a tracback from the saved tab list: 1. Using the rocker, highlight a track, and press nav. The follow automatically appears highlighted. 2. ...

  • Page 68

    62 gpsmap 188/188c sounder owner’s manual m ain m enu > c ard and t ime t abs card tab the card tab contains options for saving waypoints, routes and tracks to a data card. When data is saved to a data card, it can be exchanged with other compatible units and garmin’s mapsource pc program. To transf...

  • Page 69

    Gpsmap 188/188c sounder owner’s manual 63 m ain m enu > p ages t ab pages tab the pages tab allows you to turn on or off any of the main pages or jump to a particular page. You can also set the page that appears first when you turn on the unit or enable/disable the gps info on the initial screen. To ...

  • Page 70

    64 gpsmap 188/188c sounder owner’s manual m ain m enu > m ap t ab map tab the map tab changes the display properties of the map page. The following pages contain descriptions of the map tab’s eight sub tabs. General sub tab • detail—most, more, normal, less, least: controls how much map detail appea...

  • Page 71

    Gpsmap 188/188c sounder owner’s manual 65 m ain m enu > m ap t ab to display the map information page: 1. Highlight the data card maps button, and press enter. 2. Use the rocker to scroll through the list of maps. 3. To select or deselect a map, highlight the check box to the left of the name of a m...

  • Page 72

    66 gpsmap 188/188c sounder owner’s manual m ain m enu > m ap t ab points sub tab the spot soundings, tide stations, and services options each contain adjustments for text and zoom. • text—none (except spot soundings), small, medium, and large: controls the screen size of the name. • zoom—auto, off, ...

  • Page 73

    Gpsmap 188/188c sounder owner’s manual 67 m ain m enu > m ap t ab nav line sub tab • heading line—on/off: draws an extension from the end of the boat icon in the direction of travel. • bearing line—on/off: toggles the black/white line that points to the current navigation point. • course line—auto, ...

  • Page 74

    68 gpsmap 188/188c sounder owner’s manual m ain m enu > h iway , t emp , and s onar t abs hiway (highway) tab the highway tab contains display settings for the highway page. Refer to the “highway page” section on page 35 . Temp (temperature) tab the temperature tab displays the water temperature log...

  • Page 75

    Gpsmap 188/188c sounder owner’s manual 69 m ain m enu > s ystm t ab systm (system) tab the system tab controls system setting for beeper, speed filter, languages, system mode, and simulator controls, restores factory settings, displays the software version, and prepares software update cards. The fol...

  • Page 76

    70 gpsmap 188/188c sounder owner’s manual m ain m enu > u nits t ab units tab the unit tab defines the position format, map datum, heading, distance, speed, elevation, depth, and temperature units. The following settings are available: • position format—changes the coordinate system. You should only ...

  • Page 77

    Gpsmap 188/188c sounder owner’s manual 71 m ain m enu > u nits t ab • heading—selects 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 that are automatically determined from ...

  • Page 78

    72 gpsmap 188/188c sounder owner’s manual m ain m enu > c omm t ab comm (communications) tab the communications tab controls the input/output format used when connecting your gpsmap 188/188c sounder to external nmea devices, a dgps beacon receiver, a personal computer, or another garmin unit. Note: ...

  • Page 79

    Gpsmap 188/188c sounder owner’s manual 73 m ain m enu > c omm t ab when transferring data between two garmin units, always set one to host and use the other unit to either send or request the data. To select an input/output format: 1. Select port 1 or port 2, highlight the serial data format field, a...

  • Page 80

    74 gpsmap 188/188c sounder owner’s manual m ain m enu > c omm t ab to adjust the nmea output: 1. From the comm tab, press menu, highlight nmea setup, and press enter. 2. Highlight an option, and press enter. 3. Use the rocker to select a setting, and press enter. Press quit to return to the comm tab...

  • Page 81

    Gpsmap 188/188c sounder owner’s manual 75 m ain m enu > c omm t ab status field snr and distance shows data when signal note: the dgps beacon transmitters are operated by the u.S. Coast guard (or similar government agency in other countries), and are responsible for their accuracy and maintenance. F...

  • Page 82

    76 gpsmap 188/188c sounder owner’s manual m ain m enu > a larm t ab alarm tab the alarm tab allows you to define the alarm settings. The alarm tab is divided into three sub tabs: system alarms, nav alarms, and sonar alarms. System sub tab • clock—provides an alarm for the system clock. Enter a time i...

  • Page 83

    Gpsmap 188/188c sounder owner’s manual 77 m ain m enu > a larm t ab to set an alarm: 1. Use the rocker to highlight a sub tab. 2. Highlight the field you want to set, and press enter. 3. Enter a setting, and press enter. 4. If you want the alarm to display and beep until acknowledged, highlight the p...

  • Page 84

    78 gpsmap 188/188c sounder owner’s manual u sing s onar > s onar p age u sing s onar this section covers the additional sonar options for the gpsmap 188/188c sounder when used in conjunction with a transducer. Read the transducer’s installation instructions to properly install the transducer. Note: ...

  • Page 85

    Gpsmap 188/188c sounder owner’s manual 79 u sing s onar > s onar p age using the adjustment menu the adjustment menu gives you direct access to the settings and features most commonly used on the sonar page. The option selected currently appears in the upper left of the display. Press menu and highl...

  • Page 86

    80 gpsmap 188/188c sounder owner’s manual u sing s onar > s onar p age range adjustment zoom adjustment range—sets the display depth range used for viewing. The unit can be set to automatically track the bottom or set to a user- specified depth range. Auto mode displays the most information possible ...

  • Page 87

    Gpsmap 188/188c sounder owner’s manual 81 u sing s onar > s onar p age • btm (bottom) split—shows two reduced pictures; the right at the original depth scale and the left showing sonar returns from the bottom up. All target depths read as a distance from the bottom. • btm (bottom) lock—displays only...

  • Page 88

    82 gpsmap 188/188c sounder owner’s manual u sing s onar > s onar p age whiteline—controls how the unit displays information about the bottom type (hard or soft). With the whiteline off, the bottom return displays as red and contains no information on bottom hardness. With whiteline set at normal or ...

  • Page 89

    Gpsmap 188/188c sounder owner’s manual 83 u sing s onar > s onar p age scroll—adjusts the rate that the graph scrolls from right to left. If you are sitting still or the graph is moving too fast, slowing the scroll rate or pausing it can be beneficial. Sonar page options the gpsmap 188/188c sounder’s...

  • Page 90

    84 gpsmap 188/188c sounder owner’s manual u sing s onar > s onar p age show pointer option data window pointer to mark an underwater waypoint: 1. From the sonar page, press menu, highlight show pointer, and press enter to pause the screen movement. 2. Use the rocker to move the pointer onto the targ...

  • Page 91

    Gpsmap 188/188c sounder owner’s manual 85 u sing s onar > s onar p age size split—enables width adjustment of the sonar page split screen. This option is available only when a split screen zoom scale is selected. You can adjust the size of the split window anywhere from 1/4 to 3/4 width of the right...

  • Page 92

    86 gpsmap 188/188c sounder owner’s manual u sing s onar > s onar t ab o ptions depth number—controls the efficiency of the digital depth update rate. Fast update updates more quickly and is recommended for low-noise, deeper water (>50 ft). Auto is best for shallow water or high noise areas, and produ...

  • Page 93

    Gpsmap 188/188c sounder owner’s manual 87 u sing s onar > s onar t ab o ptions keel offset—used to offset the surface reading for the depth of a keel. This makes it possible to measure depth from the bottom of your keel instead of from the transducer’s location. Enter a positive number to offset for...

  • Page 94

    88 gpsmap 188/188c sounder owner’s manual u sing s onar > s onar t ab o ptions to calibrate the water speed: 1. On the sonar tab, use the rocker to highlight calibrate water speed and press enter. 2. Bring the boat to a cruising speed. The top ground and uncalibrated water speeds are shown at the bo...

  • Page 95

    Gpsmap 188/188c sounder owner’s manual 89 u sing s onar > s onar t ab o ptions understanding sonar the transducer mounted on your vessel transmits sound waves toward the bottom of a lake, stream, or seabed in a cone-shaped pattern. When a transmitted sound wave strikes an underwater object—such as t...

  • Page 96

    90 gpsmap 188/188c sounder owner’s manual u sing s onar > u nderstanding s onar transducer coverage the area covered by the transmitted sound waves is determined by the cone angle of the transducer and the water depth. The wide cone angles (40°) associated with low frequencies (50 khz) provide a lar...

  • Page 97

    Gpsmap 188/188c sounder owner’s manual 91 u sing s onar > u nderstanding s onar whiteline when the sonar sound waves are reflected back by the bottom, a hard bottom returns a stronger signal than a soft bottom. A thin whiteline indicates a softer bottom, while a thick whiteline indicates a harder bot...

  • Page 98

    92 gpsmap 188/188c sounder owner’s manual a ppendix > s pecifications a ppendix specifications physical specifications size: 188: 6.2" h x 6.3" w x 2.6" d (15.8cm x 16.0cm x 6.6cm) 188c: 6.2" h x 6.3" w x 3.7" d (15.8 cm x 16.0 cm x 9.4 cm) weight: 188: 1.7 lbs. (.77kg); 188c: 2.6 lbs. (1.18 kg) displ...

  • Page 99

    Gpsmap 188/188c sounder owner’s manual 93 a ppendix > i nstalling the gpsmap 188/188c s ounder installing the gpsmap 188/188c sounder the gpsmap 188/188c sounder must be properly installed according to the following instructions to get the best possible performance. To complete the installation, you...

  • Page 100

    94 gpsmap 188/188c sounder owner’s manual a ppendix > m ounting the gpsmap 188/188c s ounder to install the gps antenna: 1. Screw the antenna directly onto the 1 " x 14-thread mount. 2. Route the cable to the mounting location of the display unit. Use the appropriate tie-wraps, fasteners, and sealan...

  • Page 101

    Gpsmap 188/188c sounder owner’s manual 95 a ppendix > m ounting the gpsmap 188/188c s ounder to install the gpsmap 188/188c sounder: 1. Select a location for the mounting bracket. 2. Mark and drill the four mounting holes for the fastener you are using. 3. Fasten the bracket to the surface using the...

  • Page 102

    96 gpsmap 188/188c sounder owner’s manual a ppendix > i nstalling the t ransducer installing the transducer the transducer acts as the eyes and ears of your new sonar. Proper transducer installation is critical to the operation of your unit. The transducer transmits sound waves toward the bottom in ...

  • Page 103

    Gpsmap 188/188c sounder owner’s manual 97 a ppendix > i nstalling the t ransducer transom mount transducer the following diagram is for mounting the transducer included with the gpsmap 188/188c sounder with transducer package. If the transducer lead is too short, extension cables are available from ...

  • Page 104

    98 gpsmap 188/188c sounder owner’s manual a ppendix > c onnecting the p ower /d ata c able connecting the power/data cable the power/data cable connects the gpsmap 188/188c sounder to a dc system and provides interface capabilities for connecting external devices. The color code in the diagram below...

  • Page 105

    Gpsmap 188/188c sounder owner’s manual 99 a ppendix > i nterfacing interfacing the following formats are supported for connection of external devices: garmin proprietary differential gps (dgps), nmea 0183 versions 3.0, ascii text output, rtcm sc-104 input (vs. 2.0). The following are the sentences f...

  • Page 106

    100 gpsmap 188/188c sounder owner’s manual a ppendix > i nstalling and r emoving d ata c ards installing and removing data cards the gpsmap 188/188c sounder uses optional garmin marine bluechart and mapsource data cards to display digital charts and maps on-screen. Data cards are installed in the ca...

  • Page 107

    Gpsmap 188/188c sounder owner’s manual 101 a ppendix > s atellite i nformation satellite information satellite sky view 45° 90° outer ring - the horizon inner ring- 45° above the horizon center dot - 90° above the horizon satellite location the location of each available satellite is displayed over ...

  • Page 108

    102 gpsmap 188/188c sounder owner’s manual a ppendix > w hat is a waas and dgps? What is waas? The wide area augmentation system (waas) is an f.A.A. Funded project to improve the overall integrity of the gps signal. It is a space-based system that broadcasts integrity information and correction data...

  • Page 109

    Gpsmap 188/188c sounder owner’s manual 103 a ppendix > w hat is mmsi? What is maritime mobile service identity (mmsi)? Maritime mobile service identity (mmsi) basically allows a vhf radio to act like a phone. In order to make a “call” on a phone, you first need a phone number to dial. The 9 digit mms...

  • Page 110

    104 gpsmap 188/188c sounder owner’s manual a ppendix > n avigation t erms navigation terms avg speed—the average of all second-by-second speed readings since last reset. Bearing (brg)—the compass direction from your current location to a destination. Course—the course between the active from and to ...

  • Page 111

    Gpsmap 188/188c sounder owner’s manual 105 a ppendix > n avigation t erms pointer—an arrow pointing to your destination. Speed—the current velocity at which you are travelling, relative to a ground position. Also referred to as ground speed. Sunrise—the current day’s time of sunrise. Sunset—the curr...

  • Page 112

    106 gpsmap 188/188c sounder owner’s manual a ppendix > m essages messages approaching turn—you are nearing a turn in a route. Arriving at destination—you are nearing your destination. Batteries low—you have less than 10 minutes of battery left. Can’t unlock maps—no applicable unlock code for one or ...

  • Page 113

    Gpsmap 188/188c sounder owner’s manual 107 a ppendix > m essages track already exists—a saved track with the same name already exists. Track memory full—no more track data can be stored without deleting old data. Track log full—the track log is full and track recording has been turned off. To record...

  • Page 114

    108 gpsmap 188/188c sounder owner’s manual a ppendix > l oran td s ystem 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 unite...

  • Page 115

    Gpsmap 188/188c sounder owner’s manual 109 a ppendix > l oran td s ystem the loran position format field is located on the setup– location tab on the main menu. The loran td setup window contains the fields to select the loran gri-chain number, primary and secondary stations, and td offsets. To set up...

  • Page 116

    110 gpsmap 188/188c sounder owner’s manual a ppendix > o ptional a ccessories optional accessories the following optional accessories are designed to enhance the operation of the gpsmap 188/188c sounder. To obtain replacement parts and optional accessories, contact your garmin dealer, garmin product...

  • Page 117

    Gpsmap 188/188c sounder owner’s manual 111 a ppendix > s oftware l icense a greement and p roduct r egistration software license agreement by using the gpsmap 188/188c sounder, you agree to be bound by the terms and conditions of the following software license agreement. Please read this agreement c...

  • Page 118

    112 gpsmap 188/188c sounder owner’s manual a ppendix > l imited w arranty limited warranty this garmin product is warranted to be free from defects in materials or workmanship for one year from the date of purchase. Within this period, garmin will at its sole option repair or replace any components ...

  • Page 119

    Gpsmap 188/188c sounder owner’s manual 113 a ppendix > fcc c ompliance the garmin gpsmap 188/188c sounder has no user-serviceable parts. Should you ever encounter a problem with your unit, please take it to an authorized garmin dealer for repairs. The gpsmap 188/188c sounder is fastened shut with sc...

  • Page 120

    114 gpsmap 188/188c sounder owner’s manual a ppendix > s afety i nformation safety information caution: use the gpsmap 188/188c sounder at your own risk. To reduce the risk of unsafe operation, carefully review and understand all aspects of this owner’s manual—and thoroughly practice operation using...

  • Page 121

    Gpsmap 188/188c sounder owner’s manual 115 i ndex i ndex symbols 2d differential 42 2d gps location 89, 101 3d differential 42 3d gps location 101 a accessories 110 accuracy 39 accuracy alarm 76 accuracy circle 67 active route page 37 options 38 alarms accuracy 76 anchor drag 76 arrival 76 battery 7...

  • Page 122

    116 gpsmap 188/188c sounder owner’s manual i ndex l language 69 license agreement 111 loran td 108 m magnetic variation 71 main menu 39 main pages 26 man overboard 10 mapsource 62 map data information 114 map datum 70 map detail 64 map information page 65 map page 27 options 30 setup map 33 map poin...

  • Page 123

    Gpsmap 188/188c sounder owner’s manual 117 i ndex tracback 14 activate 16 track logs clear 15 save 15 track tab 59 active 59 saved 59 track up 64 transducer 90, 96 trip planning 58 trip tab 46 u underwater waypoints 84 units tab 70 unit defaults 69 w waas 40, 102 disable/enable 41 waterproof iv wate...

  • Page 126

    For the latest free software updates (excluding map data) throughout the life of your garmin products, visit the garmin web site at www.Garmin.Com. © copyright 2005 garmin ltd. Or its subsidiaries garmin international, inc. 1200 east 151 st street, olathe, kansas 66062, u.S.A. Garmin (europe) ltd. U...