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Garmin GPSMap 188/188C Sounder 

The dual frequency 188 Sounder combines chartplotter and sounder capabilities in one unit which installs easily in open cockpit and overhead boxes. The backlit display and keyboard and large numbers option all ensure easy viewing.

A unique design feature of this product is quick map redraws using a high speed RISC processor. Detailed marine cartography is presented on a high resolution FSTN, 5.5" diagonal (240 x 360 pixels), 10-level grayscale, liquid crystal display.

With a built-in worldwide basemap (to 32nm), the GPSMAP 188 Sounder will accept data cards programmed with GARMIN BlueChartT marine cartography or data from most MapSourceT CD-ROM products.

Preprogrammed BlueChart data cards are available now!

The GPSMAP 188 can provide position accuracy to less than 3 metres when receiving WAAS corrections.

• 3000 user waypoints with name and graphic symbol; 50 reversible routes with 50 waypoints each, plus MOB and TracBack modes
• Audible alarms for anchor drag, arrival, off-course, proximity waypoint and clock
• 3000 point automatic track log; 15 saved tracks let you retrace your path in both directions, 500 points per saved track
• Position formats include Lat/Lon, UTM, Loran TDs, Maidenhead, MGRS and user grid
• Course and speed filtering
• Built-in celestial tables
for sun and moon calculations
• 6.2"H x 6.3"W x 2.6"D, Weight: Approx 2.0 lbs
• Choose from internal quad helix antenna or external GA 29 remote antenna (with 30 ft. cable)
• Transmit frequency: 50/200 kHz (40°/10°)
• Transmit power: 500 watts RMS, 4000 watts peak-to-peak
• Auto bottom tracking with 2X, 4X zoom levels
• Split screen combining both map and sounder data
• Simultaneous display of both 50kHz and 200 kHz frequencies
• Graphic whiteline for clear image of bottom hardness and structure
• Underwater waypoints to capture position and depth
• See-Thru®
technology separates fish from thermoclines and structure

NOTE: A transducer is required for operation of the GPSMAP 188 Sounder. A plastic, transom mount transducer with depth and temperature is supplied with some GPSMAP 188 Sounders. If you wish to use another type of transducer you could purchase the GPSMAP 188 Sounder without a transducer and pair it with one of GARMIN's range of dual-frequency transducers. Click here for a list of compatible transducers.



188C Colour External Antenna Models
GPSMap 188C Sounder, External GPS Antenna, without Transducer (Transducer required for operation)
GPSMap 188C Sounder, External GPS Antenna, 200/50KHz Transducer (010-10272-00)
188 Grayscale External Antenna Models
GPSMap 188 Sounder, External GPS Antenna, without Transducer
(Transducer required for operation)
GPSMap 188 Sounder, External GPS Antenna, 200/50KHz Transducer (010-10272-00)

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