Garmin GSD28 High-Performance Sonar Module for Fishing
Dive into the thrill of deep-sea fishing with the Garmin GSD28 Sonar Module! Engineered for fishing enthusiasts, it's your ultimate companion for reeling in a bountiful catch on every expedition.
Unbeatable Features
- RapidReturn Technology: Experience lightning-fast deep water scrolling sonar with a ping rate 2 to 6 times higher than GSD26. Spot fish quicker and never miss a bite!
- xChirp Technology: Whether it's a friendly weekend fishing trip or a competitive event, easily distinguish between bait and sport fish with traditional sonar fish arches and efficient target separation.
- Heave Compensation: Minimize wave and swell interference with the MSC10 external satellite compass (sold separately). Get clear sonar returns every time.
Why Choose Garmin GSD28?
Designed for offshore sport fishing, this module offers faster sonar views, precise fish separation, and reduced wave interference. Compatible with Garmin and AIRMAR transducers, it's perfect for retrofitting boats. With 300 watts to 3kW output at extreme depths and dual channel Chirp support, it's a force to be reckoned with.



The Garmin GSD28 Sonar Module is a must-have for fishing enthusiasts. Use it during offshore sport fishing trips. It has a fully gasketed aluminum housing with a steel back panel and plastic access panel. Its dimensions are 10.7' x 14.4' x 4.0' and it weighs 14.13lbs. It's water rated IPX7 and can operate in temperatures from 5°F to 158°F (-15°C to 70°C). Power input is 10 - 32 V, power usage is 120 W maximum with a 15A fuse. Comes with a power cable, Garmin BlueNet marine network cable, field installable adapter kit, mounting hardware, and documentation.