GSD™ 26 CHIRP Professional Sonar Module
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GARMINGSD™ 26 CHIRP Professional Sonar Module


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Model # 12008363 | Mfg # 010-00958-00UPC # 753759969738


GSD™ 26 CHIRP Professional Sonar Module

Name Value
Amperage 10 Amps
Connection Interface Garmin Marine Network
Dimensions 14 11/16" Width x 3 15/16" Height x 10 13/16" Length
Frequency Manually Adjustable
from 25 kHz to 210 kHz
Maximum Depth 10000'
Mount Type Surface
Specific Transducer Sold Separately
Transmit Power Selectable 300 to 3000 Watts
Warranty Details One Year
Waterproof Waterproof

Product Overview

The GSD 26 is a remote CHIRP sounder for the serious sport angler.

CHIRP Spread Spectrum technology:  GSD™ 26 CHIRP Professional Sonar Module takes high-definition gamefish targeting to a new level with digital Spread Spectrum technology, scanning on multiple frequencies at one time, returning vast amounts of data. As a result, you can expect precise, shallow-water-like target separation at much greater depths—up to 10,000'. 

Traditional sonar: Its traditional fixed frequency mode also lets you dial into specific frequencies, from a very low 25kHz to a high of 210kHz, to target certain species of sport fish, with significantly better target definition, bottom contours and signal noise suppression at greater depths than traditional models.

Dual-transceivers allow for simultaneous and independent dual transducer operation, which allows complete customization. GSD 26 provides faster screen updates and a more timely interpretation of what’s below for safer navigation and better fishing.

Selectable transmit power: Designed for Garmin’s newest broadband transducers, the GSD 26 offers selectable transmit power from 300 to 3,000 watts.


  • Frequency: Manually adjustable, from 25kHz to 210kHz
  • Transmit Power: Selectable 300-3,000W
  • Maximum Depth: 10,000'
  • Dimensions: 14 11/16"W x 10 13/16"L x 3 15/16"H
  • Included Equipment: Power cable and 6' Marine Network cable, mounting hardware, SD card
  • NMEA Interface: Ethernet
  • Compatible Devices: Compatible with the Garmin Marine Network for display on the latest Garmin GPSMAP® 4000/5000 and 6000/7000/8000 series displays
  • Transducer: Sold separately
  • Waterproof Rating: IPX7
  • Warranty: Two years

 What's in the box

  • GSD 26
  • Power cable
  • Marine network cable (6')
  • Mounting hardware
  • software update SD card
  • Documentation

Transducer Options

This product operates best with these select transducers, sold separately. Depending on the style of the transducer, you'll get depth, speed and/or temperature readings. To complete your installation, order one of the following transducers:

Transducer TypeReading(s)Transmit PowerMax. DepthMaterialModel
CHIRP Airmar B265LM Thru-Hull (Bare Wire)Depth/Temperature1 kW3,000'Bronze13178736
CHIRP Airmar R109LH Thru-Hull (Bare Wire)Depth/Temperature2 kW8,000'Plastic13178744
 WARNING: Cancer and Reproductive Harm -


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