GPSMAP® 235 Sounder

Part Number: 010-00119-00
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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
Power consumption 10 W max

Maps & Memory

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

Features & Benefits

Garmin Radar compatible No
Garmin Sonar compatible Yes
NMEA 2000® compatible No
NMEA 0183 compatible Yes
Garmin Marine Network™ compatible No
Garmin SmartMode compatible (customizable monitor presets) No
Supports AIS (tracks target ships position) No
Supports DSC (displays position data from DSC-capable VHF radio) No
Tide tables No
Garmin Meteor Audio System compatible No
Supports Fusion Lync compatible marine radios No
GSD™ Black Box sonar support No
GCV™ Black Box sonar support No
SiriusXM™ Weather & Radio compatible No
BlueChart® Mobile (planning) compatible No
Garmin Helm compatible No
GRID™ (Garmin Remote Input Device) compatible No
Wireless remote compatible No
Wireless mouse compatible No

Sonar Features & Specifications

Dual-frequency (50/200 kHz) sonar capable Yes
Dual-beam (77/200 kHz) sonar capable No
Frequencies supported 50/200 kHz
Transmit power 500 W (RMS); 4,000 W (Peak to Peak)
CHIRP sonar technology No
DownVü™ No
SideVü™ No
Voltage range 10-40 vDC input
Bottom lock (shows return from the bottom up) No
Water temperature log and graph No
Sonar recording No
Sonar history rewind No


NMEA 0183 input ports 1
NMEA 0183 output ports 1
Video input ports None
Video output ports None
Wireless connectivity No
Garmin Marine Network™ 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.

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