GPSMAP® 235 Sounder

Part Number: 010-00119-00


The GPSMAP 235 Sounder really offers three products in one: a GPS receiver, a chartplotter, and a fishfinder. You won't need to duplicate technology to enjoy your sport to its fullest.

This unit features dual-frequency operation that provides a clear image in both deep and shallow water—1,200 feet in saltwater and freshwater—all from one transducer. Garmin's exclusive See-Thru® technology lets the GPSMAP 235 Sounder hear both weak and strong signals at the same time, giving it tremendous dynamic range. The result is a 4-level grayscale display that shows strong fish returns even when fish are inside structure and thermoclines. Over 25 square inches of active viewing area gives you sizable detail coverage. The backlit screen measures an impressive 7.25" diagonally, yet the unit itself is slim enough—a mere 2.57" deep—for discreet and easy bulkhead flush mounting. A variable zoom window allows you to view increased detail at the touch of a button. You can even mark underwater waypoints to capture the position and depth of objects like reefs, dropoffs, or hazards and permanently store them for future use.

The GPSMAP 235 Sounder: It's everything you need for fishing in any condition.


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Physical & Performance

Physical dimensions 7.7" x 7.6" x 2.6" (19.56 x 19.18 x 6.53 cm)
Weight 2.0 lbs (.907 Kg)
Antenna Internal with external connection
NMEA 0183 compatible
Power consumption 10 W max
Garmin Marine Network™ ports None

Maps & Memory

Preloaded maps None
Accepts data cards 1 G-Chart
Waypoints 250
Routes 20

Chartplotter Features

Garmin Sonar compatible

Sonar Features & Specifications

Dual-frequency (50/200 kHz) sonar capable
Frequencies supported 50/200 kHz
Transmit power 500 W (RMS); 4,000 W (Peak to Peak)


NMEA 0183 input ports 1
NMEA 0183 output ports 1
Video input ports None
Video output ports None

In the Box

  • GPSMAP 235 Sounder
  • Basemap: Marine Detailed
  • Transom-mount transducer
  • Surface/flush mount bracket
  • Remote antenna
  • Power/data cable
  • Owner's manual
  • Quick reference guide


Maps for New Regions

Need maps for other regions? See all maps that are compatible with this device.

Need a map update?

Update the maps that came with your device for the best navigation experience.

Check for Updates