Owners Manual
Page 3
...GPSMAP 188, GPSMAP 188C (color), and GPSMAP 232. Introduction Preface and Registration i This manual is divided into two parts for your unit. Have the serial number of your GPSMAP 188/188C/238 handy and connect to create an unsurpassed marine navigation chartplotters. Part One introduces you to the GPSMAP 188/188C/238 Sounder...provided by completing our on-line registration today! The Garmin GPSMAP® 188/188C/238 Sounders utilize the proven performance of Garmin GPS and full featured mapping to our web site (www.garmin.com). Preface Congratulations on choosing one of the most...
...GPSMAP 188, GPSMAP 188C (color), and GPSMAP 232. Introduction Preface and Registration i This manual is divided into two parts for your unit. Have the serial number of your GPSMAP 188/188C/238 handy and connect to create an unsurpassed marine navigation chartplotters. Part One introduces you to the GPSMAP 188/188C/238 Sounder...provided by completing our on-line registration today! The Garmin GPSMAP® 188/188C/238 Sounders utilize the proven performance of Garmin GPS and full featured mapping to our web site (www.garmin.com). Preface Congratulations on choosing one of the most...
Owners Manual
Page 9
... and structure • Four zoom levels with backlighting • 12-channel parallel receiver tracks and uses up to give you the information you need: Precision Performance • 188C: High-contrast, 16-color LCD screen with backlighting; 188/238: High-contrast, ten-level gray, LCD...Built-in Worldwide marine basemap to 20 miles includes detailed ocean, river and lake coastlines, cities, interstates, US state highways, and local thoroughfares • 50 reversible routes with up to 12 satellites for detailed electronic charting capability, the Garmin GPSMAP 188/188C/238 Sounder is a ...
... and structure • Four zoom levels with backlighting • 12-channel parallel receiver tracks and uses up to give you the information you need: Precision Performance • 188C: High-contrast, 16-color LCD screen with backlighting; 188/238: High-contrast, ten-level gray, LCD...Built-in Worldwide marine basemap to 20 miles includes detailed ocean, river and lake coastlines, cities, interstates, US state highways, and local thoroughfares • 50 reversible routes with up to 12 satellites for detailed electronic charting capability, the Garmin GPSMAP 188/188C/238 Sounder is a ...
Owners Manual
Page 24
...a 2X zoom (Dual 2X) on one half and normal range dual frequency (Dual) returns on the left of the area being displayed. On color models, sonar returns show dual frequency at the bottom of these options (see page 35), the appearance of both. 'Fish Symbols' appear as perfect...bottom lock (display scaled from the wider beam (50kHz) will change. Simulated fish icons are closer to show as they pass under your GPSMAP 188/188C/238 Sounder becomes a powerful fishfinder/ flasher. More on understanding the Sonar Page may also be set to the unit, a "...
...a 2X zoom (Dual 2X) on one half and normal range dual frequency (Dual) returns on the left of the area being displayed. On color models, sonar returns show dual frequency at the bottom of these options (see page 35), the appearance of both. 'Fish Symbols' appear as perfect...bottom lock (display scaled from the wider beam (50kHz) will change. Simulated fish icons are closer to show as they pass under your GPSMAP 188/188C/238 Sounder becomes a powerful fishfinder/ flasher. More on understanding the Sonar Page may also be set to the unit, a "...
Owners Manual
Page 43
Fish are shown as solid white. Thermoclines are displayed as colored arches or as fish icons in the upper left of the display. A thin whiteline indicates a soft bottom while a thick whiteline will be the primary ... adjustment window; Sonar Page The Sonar Page is displayed as shades of blue. The area of strongest sonar return (or whiteline) is where your GPSMAP 188/188C/238 Sounder becomes a powerful fishfinder/ flasher. Using the Adjustment Menu The Adjustment Menu allows direct access to the settings and features most...
Fish are shown as solid white. Thermoclines are displayed as colored arches or as fish icons in the upper left of the display. A thin whiteline indicates a soft bottom while a thick whiteline will be the primary ... adjustment window; Sonar Page The Sonar Page is displayed as shades of blue. The area of strongest sonar return (or whiteline) is where your GPSMAP 188/188C/238 Sounder becomes a powerful fishfinder/ flasher. Using the Adjustment Menu The Adjustment Menu allows direct access to the settings and features most...
Owners Manual
Page 65
... box to create a TracBack route. To activate a TracBack using the 'Follow Track' option. Reference TracBack Navigation Default Track name Total Distance Change color or style of track line Check this box to display track Total number of points You must be at least two track log points stored... on the track log setup page must be used to save a track before using the NAV key: 1. Once a TracBack has been activated, the GPSMAP 188/188C/238 Sounder will be set to 'Fill' or 'Wrap'. • There must first save the track. 2. Highlight 'OK' and press ENTER to display...
... box to create a TracBack route. To activate a TracBack using the 'Follow Track' option. Reference TracBack Navigation Default Track name Total Distance Change color or style of track line Check this box to display track Total number of points You must be at least two track log points stored... on the track log setup page must be used to save a track before using the NAV key: 1. Once a TracBack has been activated, the GPSMAP 188/188C/238 Sounder will be set to 'Fill' or 'Wrap'. • There must first save the track. 2. Highlight 'OK' and press ENTER to display...
Owners Manual
Page 105
...sentences- Connecting the Power/Data Cable The power/data cable connects the GPSMAP 188/238 Sounder to a 8-35 (GPSMAP 188C 10-35) volt DC system and provides interface capabilities for normal operation of external devices: Garmin proprietary Differential GPS (DGPS), NMEA 0183 version 2.3*, RTCM SC-104 input (version ...color code in 3.01. AGC/3AG - 5 Amp (RX COM 1) COM 1 Tx COM 1 Rx COM 2 Tx COM 2 Rx DC Power Source Interfacing The following are the sentences for the DPT (Depth), MTW (Water Temp) and VHW (Water Speed & Heading) sentences. The GPSMAP 188/188C/238 Sounder...
...sentences- Connecting the Power/Data Cable The power/data cable connects the GPSMAP 188/238 Sounder to a 8-35 (GPSMAP 188C 10-35) volt DC system and provides interface capabilities for normal operation of external devices: Garmin proprietary Differential GPS (DGPS), NMEA 0183 version 2.3*, RTCM SC-104 input (version ...color code in 3.01. AGC/3AG - 5 Amp (RX COM 1) COM 1 Tx COM 1 Rx COM 2 Tx COM 2 Rx DC Power Source Interfacing The following are the sentences for the DPT (Depth), MTW (Water Temp) and VHW (Water Speed & Heading) sentences. The GPSMAP 188/188C/238 Sounder...
Owners Manual
Page 121
...strong return sets the bottom level below the transducer. Appendix I Understanding Sonar This fish is brief description of how the GPSMAP 188/188C/238 Sounder operates and how it determines what is returned: first returned-first on the graph, this data can see that..., stream or seabed in darker colors, black being the strongest return. the first strong return sets the bottom level. The transducer collects the reflected sound waves and sends the data to the unit to improve your GPSMAP 188/188C/238 Sounder operates. Briefly described,...
...strong return sets the bottom level below the transducer. Appendix I Understanding Sonar This fish is brief description of how the GPSMAP 188/188C/238 Sounder operates and how it determines what is returned: first returned-first on the graph, this data can see that..., stream or seabed in darker colors, black being the strongest return. the first strong return sets the bottom level. The transducer collects the reflected sound waves and sends the data to the unit to improve your GPSMAP 188/188C/238 Sounder operates. Briefly described,...