Find out what's under your boat and capture it! Take your sport fishing to extreme depths with a high-performance sonar module with the functions you need to experience a day of fishing you won't easily forget.

DESIGNED FOR OFFSHORE SPORT FISHING SEE SOUNDER IMAGES FASTER WITH GARMIN RAPIDRETURN™ TECHNOLOGY CLEAR AND SHARP MARKINGS WITH xCHIRP TECHNOLOGY EXCELLENT MARKING SEPARATION WITH xCHIRP1 TECHNOLOGY REDUCE THE EFFECT OF SEA AND ROLL ON SIGNAL RETURNS THANK YOU ALLA WAVE AND TIDE COMPENSATION 2 Garmin RAPIDRETURN DEPTH SOUNDER

This high-performance technology delivers our fastest deep-water scrolling sonar with up to 6x the ping rate compared to the previous GSD™ 26 1 transducer so you always have a clear idea of what's underneath your boat.

xCHIRP TECHNOLOGY Easily distinguish large predators from schools of fish with the clear fish arches shown by our traditional fishfinders and excellent marking separation. Get perfect bottom returns and precise targeting even at extreme depths1.

WAVE COMPENSATION When things are tough at sea, use the MSC™ 10 external satellite compass (sold separately) to significantly reduce wave effect and oscillations from sonar returns.

SUPER-POWERED SONAR WITH TRANSDUCER MOUNT This fish finder is compatible with a wide range of Garmin and AIRMAR® transducers (sold separately).

ADAPTABLE The GSD 28 module is ideal for mounting on boats with existing unsheathed cable transducers.

PERFORMANCE DEPTH SOUNDER POWER The GSD 28 can output from 300 watts to 3 kW reaching extreme depths1. CHIRP SUPPORT The module supports dual-channel CHIRP (up to 3 kW per channel).

OPERATING FREQUENCY RANGE The GSD 28 sounder module can operate in the frequency range of 25 to 250 kHz1. DESIGNED TO LAST GSD 28 is certified for harsh marine environments and has IPX7 water resistance.

Package Contents: GSD 28 Power Cord 6-foot Garmin BlueNet™ Marine Network Cable with Legacy Network Adapter

Field installable adapter kit for the network

Garmin BlueNet

Mounting bracket

Documentation