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GSD 26 Asia

GSD 26 Asia

Part Number 010-00958-00


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The GSD 26 digital sonar ushers in the next evolution of sportfishing technology, providing unrivaled target separation at far greater depths than traditional sonar.

Discover Spread Spectrum Clarity

For serious deep-sea sportfishing, the GSD 26 takes high-definition targeting to a whole new level. With a compatible transducer, the GSD 26’s Spread Spectrum technology scans on multiple frequencies at one time, returning vast amounts of data to the receiver. As a result, you can expect precise, shallow-water-like target separation at much greater depths – up to 10,000 ft (3,000 m).

A traditional fixed frequency mode allows you to manually adjust frequencies from 25 kHz to 250 kHz for enhanced targeting of specific fish species. You can also adjust transmit power from 300 W to 3 kW (depending on transducer) for even more control over your sonar returns.

Get Two Sonars in One

The GSD 26's dual-transceiver design allows for simultaneous and independent transducer operation. You have complete control over the data you see on your compatible Garmin chartplotter, which easily connects to the GSD 26 over the Garmin Marine Network.

4-Split frequency mode

Support side by side quad frequencies display mode for better fish school analysis when connect with CS 1522 profession fishfinder and compatible transducers.

Dual-band CHIRP transducer list for 4-split frequency mode

Garmin Part Number


Frequency (kHz)


4-Split frequency mode support (CS 1522)

010-11642-20 AIRMAR R109LH 38~75 / 150~250 2kW O
010-11643-20 AIRMAR R111LH 38~75 / 130~210 2kW O
010-12187-20 AIRMAR R509 LHW 28~60 / 150~250 3kW / 1kW O
010-12188-20 AIRMAR CM599LHW 28~60 / 150~250 3kW / 1kW O

GSD 26: Serious sonar. For serious sportfishing.


Case material Fully gasketed, aluminum and steel housing with plastic access panel
Physical dimensions 10.8"×14.7"×3.9" (274 mm × 373 mm × 100 mm)
Weight 11.37 lbs (5.16 kg)
Water rating IPX7
Transmit power 25-3,000 W rms
Garmin Marine Network™ ports


Temperature range From 5°F to 158°F (from -15°C to 70°C)

Sonar Features & Specifications

Frequencies supported 25-250 kHz (dependent on transducer)
Maximum depth 10,000 ft (3,048 m)
Traditional CHIRP capable  


Power input 10-35 V
Power usage 100 W maximum
Fuse 10 A
Compass-safe distance 23.6 in. (60 cm)
  • Material: Fully gasketed, aluminum and steel housing with plastic access panel
  • Unit dimensions, LxWxH: 10.8"×14.7"×3.9" (274 mm × 373 mm × 100 mm)
  • Weight: 11.37 lbs (5.16 kg)
  • Waterproof: yes (IPX7)
  • Temperature range: From 5°F to 158°F (from -15°C to 70°C)
  • Power Input: 10-35 V
  • Power Usage: 100 W maximum
  • Fuse: 10 A
  • Compass safe distance: 23.6 in. (60 cm)
  • Sounder power: 25-3,000 W rms¹
  • Frequency: 25-250 kHz (dependent on transducer)
  • Depth: 10,000 ft (3,048 m)²
  • Data output: Garmin Marine Network

¹dependent on transducer rating and depth
²maximum depth, dependent on transducer, water salinity, bottom type and other water conditions

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