Garmin GSD™ 28 Sonar Module – THE DEPTHS. REVEALED.
See what’s down there. Catch what’s down there. Take your sport fishing to extreme depths with a high-powered sonar module with the features you need to improve your chances for success.
WHAT YOU’LL LOVE

GARMIN RAPIDRETURN SONAR
This high-performance technology provides our fastest deep-water scrolling sonar with 2 to 6 times the ping rate1 of our GSD™ 26 sonar. This allows captains to make fast and informed decisions based on what is below their boats.

XCHIRP TECHNOLOGY
Easily distinguish bait from sport fish with our clearest traditional sonar fish arches and excellent target separation. Get smooth bottom returns and precise targeting at extreme depths1.

HEAVE COMPENSATION
When the seas get rough, use the MSC™ 10 external satellite compass (sold separately) to greatly reduce wave and swell from your sonar returns.
SUPERCHARGED SONAR
COMPATIBILITY
PERFORMANCE
SONAR POWER: GSD 28 can output 300 watts to 3 kW at extreme depths1.
CHIRP SUPPORT: The module supports dual-channel CHIRP (up to 3 kW per channel).
OPERATION RANGE: The GSD 28 sonar module can operate in the 25 to 250 kHz frequency range1.
BUILT TO LAST: GSD 28 is rated for harsh marine environments and water-resistance with an IPX7 rating.
What’s in the box
- GSD 28
- Power cable
- Garmin BlueNet™ marine network cable (1,8 m/6 ft) with legacy network adapter
- Field installable adapter kit for the Garmin BlueNet network
- Mounting hardware
- Documentation







