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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 target, such 

as underwater drop offs and stumps, you want to mark. The 

data window at the top of the screen displays the pointer’s 

depth, coordinates, bearing, and distance from your current 

location.

3.  Press 

ENTER/MARK

. The New Waypoint Page appears 

with the waypoint’s coordinates, default three-digit name, 

and pointer depth automatically filled in.

4.  To change the name, symbol or depth, highlight the 

appropriate field and press 

ENTER

. Make your changes 

and press 

ENTER

 when finished.

5.  When finished, highlight 

OK

, and press 

ENTER

.

6.  To return to the standard Sonar Page, press 

QUIT

; or press 

MENU

, highlight 

Hide Pointer

, and press 

ENTER

.

Show/Hide Numbers

—toggles showing/hiding the data fields on 

the sonar display.

Show Numbers Option

Change Numbers

—allows you to specify the type of data 

displayed in each data field. For detailed instructions on changing 

the data fields, see 

page 31

.

Summary of Contents for GPSMAP 188C

Page 1: ...GPSMAP 188 188C Sounder chartplotting receiver owner s manual GPSMAP 188C shown...

Page 2: ...m to be viewed and to print one copy of this manual or of any revision hereto provided that such electronic or printed copy of this manual must contain the complete text of this copyright notice and p...

Page 3: ...d this manual and learn the operating procedures for your unit in detail This manual is organized into the following sections The Introduction section contains the Table of Contents and GPSMAP 188 188...

Page 4: ...phically 13 TracBack Navigation Navigating a Track 14 Routes 17 Find 19 Additional Information 21 DSC 22 Understanding Distress Calls 22 Understanding Position Reports 23 Receiving DSC Calls 23 Naviga...

Page 5: ...nar 89 Understanding the Sonar Display 89 Transducer Coverage 90 Whiteline 91 Thermoclines 91 Appendix 92 Speci cations 92 Installing the GPSMAP 188 188C Sounder 93 Mounting the GPSMAP 188 188C Sounde...

Page 6: ...he trunk of a car as permanent damage can result User information such as waypoints and routes are retained in the unit s memory without the need for external power It is always a good practice to bac...

Page 7: ...tructed view of the sky A full screen GPS Information Page appears after you press ENTER to acknowledge the Warning Page The page goes away after the unit gets a position x or you press either ENTER o...

Page 8: ...s does not calibrate the unit in any way but rather helps to speed up the initial satellite acquisition If the unit displays Ready 2D or 3D during this process it is not necessary to initialize the un...

Page 9: ...e use NOTE Do not attempt to navigate using Simulator Mode When the unit is set to Simulator Mode the GPS receiver is turned off Any satellite signal strength bars displayed are only simulations and d...

Page 10: ...il you return to the Map Page To adjust the simulated speed and heading from the Pointer or Highway Pages 1 Press up on the ROCKER increase the speed in 10 knot kph mph increments Press down on the RO...

Page 11: ...ervices POWER Key Press and hold to turn unit on or off Press and release to adjust backlighting IN OUT Zoom Keys From the Map Page press to zoom in or out From any other page press to scroll up or do...

Page 12: ...optional features that are speci c for that page To select an option requires movement of the pointer This is referred to as highlighting selecting or choosing an item 2 Use the ROCKER to move the cur...

Page 13: ...Map Range To pan the map 1 Use the IN OUT keys to select a map range 2 Use the ROCKER to move the pointer A data eld appears at the top of the display showing the bearing and distance from your boat...

Page 14: ...under s ENTER MARK key quickly captures your present location to create a new waypoint The unit must have a valid position 2D or 3D x to mark your present position You can also use this option to manu...

Page 15: ...cation or map item a description of the point its distance and bearing from your current location and the latitude longitude of the pointer is displayed along the top of the map To create a new waypoi...

Page 16: ...To activate the MOB function 1 Press the MOB key 2 Press ENTER to begin navigating to the MOB location 3 To stop navigation to the MOB location press NAV highlight Stop Navigation and press ENTER When...

Page 17: ...int Edit Page 1 Use the ROCKER to highlight the waypoint on the map display Or Press MENU twice highlight the Points tab and choose a waypoint from the User or Proximity waypoint lists 2 Press ENTER t...

Page 18: ...bearing and coordinate window You can also use the IN and OUT keys to zoom the map The map range appears in the lower right corner 3 Use the ROCKER to point to the new location and press ENTER 4 To s...

Page 19: ...be used to select one of three items from the map display an existing waypoint on screen map items such as roads rivers cities and navaids or a new map point If you are selecting a map item as the Go...

Page 20: ...ces your path using the track log automatically stored in the receiver s memory This feature eliminates the need to store waypoints along the way TracBack routes are created by reducing your track log...

Page 21: ...hrough window highlight time date or Entire Log and press ENTER When the track is saved the Save Track window appears The default name distance number of points 500 max and color are in the Save Track...

Page 22: ...te your exact path as closely as possible To get the most out of the TracBack feature remember the following tips Always clear the track log at the starting point Set the Record Mode option on the tra...

Page 23: ...ot and press ENTER Go to step 4 if you use this method 3 Select New Route and press ENTER 4 To add an existing waypoint or map item to the route use the map pointer to select a waypoint or map item an...

Page 24: ...ints To create a route using text on the Route Review Page 1 Press MENU twice to display the Main Menu 2 Use the ROCKER to highlight the Route tab and press MENU to display the route options menu or h...

Page 25: ...w Page Press ENTER to add the point to the route The next eld automatically highlights 8 Repeat steps 5 7 until all the route points are entered Press QUIT to return to the Route List Choose a waypoin...

Page 26: ...TER You can also Find from items found on the Find List The Find option also supports a nd from feature that centers your search around an item you have just found For example you search for Restricte...

Page 27: ...ation varies depending on the type of data loaded on the optional data card Sub tabs along the top of the detail window contain the information available for the item Any additional options are displa...

Page 28: ...of the caller The rescuer can choose to navigate to the caller s location to assist or forward the call on to the Coast Guard When the Coast Guard receives the call they can immediately access the ca...

Page 29: ...Bearing and Distance from your current position and the coordinates of the caller To see the caller s location on a map select the Show Map button To create a waypoint at the caller s location select...

Page 30: ...l is received Press MENU to sort the list and delete entries DSC Directory The DSC Directory acts much like a phone book and can hold up to 50 entries Pressing MENU from this page displays options to...

Page 31: ...Or 1 Highlight the call on the Call List or Log and press NAV 2 With Go To MMSI Name or DSC highlighted press ENTER Navigating to a DSC Call Setting up DSC The DSC Setup sub tab turns DSC chartplotter...

Page 32: ...ts the same as PAGE except the pages are displayed in a reverse sequence Each main page has an options menu Options menus contain the setup options and functions that apply to that page Press MENU to...

Page 33: ...plays at the bottom right of the page The Zoom IN and OUT keys combined with the ROCKER allow you select zoom ranges and move the pointer Two basic map operating modes Position Mode and Pointer Mode d...

Page 34: ...nt position changes as your location moves The pointer can also be used to view on screen waypoint and map item properties directly from the map display Pressing ENTER while highlighting a map item br...

Page 35: ...4 Press ENTER to con rm the new waypoint using the default three digit name and symbol For more information about waypoints see page 8 Selecting Map Ranges The map display has 28 available zoom range...

Page 36: ...warning appears below the range Map Page Options Many features of the GPSMAP 188 188C Sounder are menu driven Each main page has an options menu allowing you to customize the corresponding page to you...

Page 37: ...NU highlight Show Data and press ENTER Change Numbers speci es the type of data displayed in each data eld used on the map display To change a data eld 1 From the menu use the ROCKER to highlight the...

Page 38: ...map display To measure the bearing distance between two points 1 Highlight Measure Distance and press ENTER An on screen pointer labeled ENT REF appears on the map display at your present location 2 M...

Page 39: ...ation waypoint with an emphasis on the bearing to your destination and current direction of travel The middle of the page features a rotating compass ring that shows your course over ground track whil...

Page 40: ...ons on changing the data elds and layout of the Pointer Page see page 31 Numbers Page The Numbers Page provides for precision navigation to one degree of steerage The default page displays three large...

Page 41: ...es graphic steering guidance to a destination waypoint placing greater emphasis on the straight line course and the distance and direction you are off course As you head toward your destination the mi...

Page 42: ...n You can zoom in or out on the Highway display for a smaller or larger view Five available settings range from 1X to 16X with a default setting of 8X The current range appears in the bottom right of...

Page 43: ...d layout of the Highway Page see page 31 Active Route Page The Active Route Page shows each point of the active route with the point name distance and choice of Course ETA Fuel Leg Distance Leg Fuel L...

Page 44: ...ons Invert reverses the direction of the route Re evaluate recalculates and reactivates the current route Invert reverses the route To invert an active route 1 From the Active Route Page press MENU 2...

Page 45: ...of the sub tab items press right on the ROCKER and press up or down to select individual items 2 Either press MENU for additional submenu options or press ENTER to make changes to the highlighted item...

Page 46: ...ted by a 2D 2D Differential 3D or 3D Differential in the status eld The sky view shows a bird s eye view of the position of each satellite relative to the receiver s last known location The outer circ...

Page 47: ...es afterward When WAAS differential correction has been received for GPS satellites numbers 32 or below a D appears in the signal bar of the sky view and 2D or 3D Differential appears in the receiver...

Page 48: ...he receiver is no longer tracking enough satellites for a 2D or 3D x Receiver Not Usable the receiver is unusable possibly due to interference or abnormal satellite conditions Turn the unit off and ba...

Page 49: ...ons at the same time GPS Tab Options Tide Tab The Tide tab shows a graphical chart that displays tide station information in a 24 hour span starting at midnight station time You can choose from differ...

Page 50: ...orter red The solid horizontal line with the current tide box on the left indicates the current tide height The gure to the left of the line shows the current tide level in feet The Mean Lower Low Wat...

Page 51: ...rom the map 1 When the search results appear press FIND and highlight Tide Stations 2 Press ENTER and then press MENU 3 Highlight Nearest To Other and press ENTER 4 Select a location on the map and pr...

Page 52: ...or right on the ROCKER to change the time Press QUIT when nished or press MENU highlight Stop Moving Cursor and press ENTER Move the pointer to see tide heights at different times Tide data shows in a...

Page 53: ...To choose a position 1 From the Celes tab highlight the At eld and press ENTER 2 From the Find list highlight any category except Other Location and press ENTER If you want to reference a Find item se...

Page 54: ...ime From the Celes tab press MENU use the ROCKER to highlight Use Current Date and Time and press ENTER Points Tab The Main Menu Points tab features two waypoint sub tabs User and Proximity that manag...

Page 55: ...waypoints or delete all user waypoints The total number of stored and available waypoints is displayed at the bottom of the User page with the stored waypoints arranged in numerical alphabetical order...

Page 56: ...for a waypoint by name 1 Highlight the name eld and press ENTER 2 Use the ROCKER to select the rst letter of the name 3 Move to the right and enter the second letter if you do not see the name in the...

Page 57: ...t Delete All and press ENTER 3 Highlight OK and press ENTER to con rm Proximity Waypoint List The Proximity list allows you to de ne an alarm circle around a stored waypoint location and can be used t...

Page 58: ...99 units and press ENTER To turn on or off proximity alarms 1 Use the ROCKER to highlight the eld below Proximity Alarm and press ENTER 2 Select a ON or OFF setting and press ENTER To display the way...

Page 59: ...he window automatically displays Follow the route name 2 Highlight the route you want to navigate and press ENTER 3 Choose Activate or Invert and Activate and press ENTER Activate uses the route as is...

Page 60: ...2 Highlight the route you want to review and press ENTER Route List Menu Route Points Data Fields Route Name Data Totals The Route Review Page also allows you to enter your own 15 character name for...

Page 61: ...next point on the route list Show Map show the point on a map window or Delete permanently delete the waypoint from the unit and press ENTER When you are back on the route point list the next point in...

Page 62: ...ss ENTER To add turns at the beginning or end of the route 1 Select the rst to add waypoints to the beginning of the route or last to add waypoints to the end of the route route waypoint with the map...

Page 63: ...list From either the User or Nearest From Current Location tab lists choose the waypoint you want and press ENTER twice See page 50 for information on searching for waypoints by name Or To select a wa...

Page 64: ...ng information from the Route Review Page only press MENU and select Trip Planning from the options list Enter the gures for Speed Fuel Flow Departure Time and Departure Date Press QUIT to return to t...

Page 65: ...o sub tabs Active and Saved Active Sub Tab The Active sub tab is for the active log the log currently being recorded It displays track memory used and current settings Active Sub Tab Saved Sub Tab The...

Page 66: ...tance between points Time records track plot based on a user de ned time interval Resolution records track plot based on a user de ned variance from your course over ground The resolution option is th...

Page 67: ...he end to the start of your trip or Reverse which navigates you from the start to the end of your trip and press ENTER The track name automatically appears when highlighted on the Saved list and NAV i...

Page 68: ...Card and press ENTER to combine the selected items with those of your GPS 4 Highlight Replace From Card and press ENTER to overwrite all selected items on your GPS A Transfer Complete message appears...

Page 69: ...eselect that page When a page is selected a check mark appears in the box You must leave at least one page selected To set the rst page 1 Use the ROCKER to highlight the First page option and press EN...

Page 70: ...splay to a north heading Track Up xes the top of the map display to the current track heading Course Up xes the map so the direction of navigation is always up AutoZoom On Off when On the map automati...

Page 71: ...o display detailed information and notes for each area highlight a name and press ENTER 5 To view the notes for that area choose Show Notes To scroll through the notes highlight the notes press ENTER...

Page 72: ...Large controls the screen size of the name Zoom Auto Off 120 ft 800 mi sets the maximum range features should appear on the Map Page Some types of data only are visible to speci c zoom ranges Navaids...

Page 73: ...h contain adjustments for zoom Zoom Auto Off 120 ft 800 mi sets the maximum range the feature should appear on the Map Page Some types of data only are visible to speci c zoom ranges Other Sub Tab Acc...

Page 74: ...the temperature range and the duration of time The following settings are available Temperature Scale controls the temperature range for displaying the log Select Auto to have the unit automatically...

Page 75: ...or Simulator Mode Set Position sets your location while in Simulator Mode See page 3 for additional instructions Track Control Auto Track User Track controls your heading in Simulator Mode Track sets...

Page 76: ...gs under the Units tab of the GPSMAP 188 188C Sounder match that of the map or chart This information should be displayed somewhere on the map or chart If the information is not present contact the ma...

Page 77: ...the heading reference eld immediately to the right and press ENTER 2 Use the ROCKER to enter the magnetic variation at your current location and press ENTER WARNING If User Mag Var is selected you mus...

Page 78: ...Request Almanac Request Proximity Request Routes Request Tracks Request Waypoints Send Almanac Send Proximity Send Routes Send Tracks and Send Waypoints NMEA In NMEA Out supports the input output of...

Page 79: ...to select a setting and press ENTER To select a transfer mode 1 Use the ROCKER to select Garmin Data Transfer in the Serial Data Format eld 2 Highlight the Transfer Mode eld and press ENTER 3 Use the...

Page 80: ...in DGPS or RTCM In NMEA Out format is selected additional elds are provided to control a Garmin differential beacon receiver directly from your GPSMAP 188 188C Sounder The unit can automatically scan...

Page 81: ...CM In NMEA Out use the ROCKER to highlight the Beacon eld and press ENTER 2 Highlight User and press ENTER 3 Highlight the Frequency or Bit Rate eld press ENTER enter a frequency or bit rate and press...

Page 82: ...Enter a value in the distance eld and use the control eld to turn the alarm on and off Arrival sets an alarm to sound when at speci ed distance or time away from a destination waypoint Enter a distan...

Page 83: ...ght a sub tab 2 Highlight the eld 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 Persist box and press E...

Page 84: ...188 188C Sounder becomes a powerful sh nder asher To view the Sonar Page press PAGE or QUIT repeatedly until it appears Fish are displayed as colored arches or as sh icons Both sh icons and arches are...

Page 85: ...options and their current settings appears with the selected option highlighted 2 Press up or down on the ROCKER to select the option and press ENTER to access the adjustment window 3 To exit any of...

Page 86: ...iew The Zoom setting is divided into six display levels 4X Split Zoom Display Dual Frequency Mode 2X Split shows two reduced size sonar pictures at the same time The right half of the display screen s...

Page 87: ...ng range of a zoomed display If the Zoom is set to 2X split or 4X split only the zoomed portion on the left side of the screen is affected by the change If the Zoom is set to Bottom Split or Bottom Lo...

Page 88: ...horizontal depth line across the display that is used to measure the depth of underwater objects The depth of the line appears in a box on the right side of the line Press up or down on the ROCKER to...

Page 89: ...justment Menu options and their current settings see page 79 To change an Adjustment setting 1 While on the Adjustment options list use the ROCKER to highlight the option and press ENTER 2 Use the ROC...

Page 90: ...ocation 3 Press ENTER MARK The New Waypoint Page appears with the waypoint s coordinates default three digit name and pointer depth automatically lled in 4 To change the name symbol or depth highlight...

Page 91: ...o return to the Sonar Page or a previous page Fish Symbols determines how the Sonar Page displays underwater targets and background information If you select off the unit does not show sh symbols If y...

Page 92: ...nd off to alert you that the unit is not tracking the bottom Main Menu Sonar Tab Scale controls the depth Scale displayed vertically along the right side of the graph The depth Scale can be con gured...

Page 93: ...ap Page sonar split range scale Full Range shows the entire scale of 2X or 4X left side split of Sonar Page Maximum Detail displays what is shown on the left side of a split sonar screen Background Co...

Page 94: ...ER 4 You can also press MENU on the calibration screen and choose Use Top Ground Speed to default back to ground speed or Use No Calibration to use the speed sensor s uncalibrated speed NOTE If the bo...

Page 95: ...and sets the bottom level Weaker secondary returns provide the detailed data Stronger returns display in darker colors with red being the strongest return Understanding the Sonar Display One of the r...

Page 96: ...ight the 40 cone angle produces a coverage area of approximately a 20 foot diameter circle at a 30 foot depth The narrow cone angles 10 associated with the high frequencies 200 kHz provide better bott...

Page 97: ...ne function to make the bottom layer information easier to distinguish Whiteline Off Whiteline On Thick Whiteline Hard bottom Thermoclines A rough de nition of a thermocline is a break in water where...

Page 98: ...Locate Approx 2 minutes Update Rate 1 second continuous GPS Accuracy Position 15 meters 49 feet 95 typical Velocity 0 05 meters sec steady state DGPS USCG Accuracy Position 3 5 meters 10 16 feet with...

Page 99: ...rs should avoid mounting the antenna high on the mast to prevent inaccurate speed readings caused by excessive heeling Most marine VHF and LORAN antennas should not seriously degrade the GPS antenna s...

Page 100: ...Mount The GPSMAP 188 188C Sounder s compact waterproof case is suitable for mounting in exposed locations or at the nav station The unit comes with a gimbal bracket that can be used for surface or ov...

Page 101: ...h the bracket and into the display case 6 Connect the power data and antenna cables external antenna only to the back of the unit making sure the locking rings are fully tightened on both connectors F...

Page 102: ...e wide cone angle provides a large coverage area but at a decreased bottom resolution In deeper water this can result in a large dead zone where sh cannot be seen A narrow cone angle transducer is bet...

Page 103: ...ind strakes struts ttings water intake or discharge ports or anything that creates air bubbles or causes the water to become turbulent It is important that the transducer is in clean non turbulent wat...

Page 104: ...ness connections Replacement fuse for the GPSMAP 188 AGC 3AG 2 Amp fuse and a AGC 3AG 5 Amp fuse for the GPSMAP 188C NOTE During a typical installation only the Red and Black wires are used The other...

Page 105: ...under accepts NMEA input with support for the DBT DPT MTW and VHW sentences The GPSMAP 188 188C Sounder also includes NMEA input with support for the WPL sentence and sonar NMEA input with support for...

Page 106: ...If the unit is on a con rmation tone sounds and a message displays on screen noting the card details when the card is properly installed and accepted 4 Close the cover If you insert a data card and g...

Page 107: ...play satellite location with North or your current track at the top of the display Satellite Strength Indicator Bars The Satellite Strength Indicator Bars show the strength of the signal being receive...

Page 108: ...ntal U S and portions of Alaska For more information go to http gps faa gov Programs WAAS waas htm NOTE If you are using the GPSMAP 188 188C Sounder outside of the U S A we recommend you turn off WAAS...

Page 109: ...ive information on how to obtain a recreational MMSI number contact http www uscg mil rescue21 links mmsi htm or http wireless fcc gov marine U S Non Federal User Commercial users or those who travel...

Page 110: ...l The time you estimate to reach your destination waypoint based on current speed and track ETA at Destination the time you estimate to reach a Go To destination or the nal waypoint in a route ETA at...

Page 111: ...ive to a ground position Also referred to as ground track Trip Odometer a running tally of distance travelled since last reset See also Odometer Total Average Speed average speed of unit for both movi...

Page 112: ...unable to continue receiving satellite signals Memory Full unit memory is full no further data can be saved Near Proximity Point you are nearing a proximity waypoint No Diff GPS Location RTCM is sele...

Page 113: ...ed off To record more track points you need to clear the track log and turn track recording on This is only displayed when the track recording setting is set to Stop When Full Track Truncated a comple...

Page 114: ...as TDs You can display your position as a TD or enter waypoints as TDs The accuracy to be expected from this conversion is approximately 30 meters When the unit is placed in the LORAN TD format mode...

Page 115: ...ting and then press ENTER 6 When nished highlight Save and press ENTER Loran TD Setup Page If the active GRI Chain secondary stations or offsets were changed since the waypoint was created the waypoin...

Page 116: ...h the GPSMAP 182 182C including MetroGuide Recreational Lakes with Fishing Hot Spots and Minnesota LakeMaster ProMap Programmable Data Cards blank data cards are available in 8 MB 16 MB 32 MB 64 MB 12...

Page 117: ...semble reverse engineer or reduce to human readable form the Software or any part thereof or create any derivative works based on the Software You agree not to export or re export the Software to any...

Page 118: ...AND EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY To obtain warranty service contact your local Garmin authorized dealer or call Garmin Product Support for shipping instructions and an RMA tracking num...

Page 119: ...ence that may cause undesired operation This equipment generates uses and can radiate radio frequency energy and may cause harmful interference to radio communications if not installed and used in acc...

Page 120: ...lways the user is responsible for their prudent use MAP DATA INFORMATION One of the goals of Garmin is to provide customers with the most complete and accurate cartography that is available to us at a...

Page 121: ...s 102 Course Line 67 Course Up 64 D Data Cards 100 Data Entry 6 Data Fields Change Numbers 31 Show 31 Split Fields 35 Date Time 101 Daylight Saving Time 62 Delete DSC Directory Item 24 Depth Line 82 D...

Page 122: ...rzoom 29 P Pages Tab 63 Page Key 5 Pointer Page 33 Options 34 Points Tab 48 Position Format 70 Position Reports 23 Power Key 5 Power On Off 1 Proximity Waypoints 52 Q Quit Key 5 R Receiving a DSC Call...

Page 123: ...Waypoints 84 Units Tab 70 Unit Defaults 69 W WAAS 40 102 Disable Enable 41 Waterproof iv Water Speed 87 Water Temperature Alarm 76 Waypoints Creating 8 Creating Graphically 9 Editing 11 Enter Mark 8 M...

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Page 126: ...armin com Copyright 2005 Garmin Ltd or its subsidiaries Garmin International Inc 1200 East 151st Street Olathe Kansas 66062 U S A Garmin Europe Ltd Unit 5 The Quadrangle Abbey Park Industrial Estate R...

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