GSD 28 Sonar Module

Overview
Specs
In the Box
Accessories
Compatible Devices
Overview 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.
ENGINEERED FOR OFFSHORE SPORT FISHING
SEE SONAR FASTER WITH GARMIN RAPIDRETURN TECHNOLOGY
CRISP AND CLEAR FISH TARGETS WITH xCHIRP TECHNOLOGY
EXCELLENT TARGET SEPARATION WITH xCHIRP TECHNOLOGY1
GREATLY REDUCE WAVE AND SWELL FROM BOTTOM RETURNS WITH HEAVE COMPENSATION2
WHAT YOU’LL LOVEGARMIN RAPIDRETURN SONARThis 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 TECHNOLOGYEasily 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 COMPENSATIONWhen the seas get rough, use the MSC 10 external satellite compass (sold separately) to greatly reduce wave and swell from your sonar returns.
SUPERCHARGED SONARCOMPATIBILITYTRANSDUCER SUPPORTThis sonar module is compatible with a wide range of Garmin and AIRMAR transducers (sold separately).
RETROFITTINGThe GSD 28 module is ideal for retrofitting to boats with existing bare wire transducers.
PERFORMANCESONAR POWERGSD 28 can output 300 watts to 3 kW at extreme depths1.
CHIRP SUPPORTThe module supports dual-channel CHIRP (up to 3 kW per channel).
OPERATION RANGEThe GSD 28 sonar module can operate in the 33 to 250 kHz frequency range1.
BUILT TO LASTGSD 28 is rated for harsh marine environments and water-resistance with an IPX7 rating.
1Transducer and depth dependent2Requires MSC 10 satellite compass; sold separatelyEngineering enhancements are ongoing and may not be reflected in the pictures, videos and specifications.Specs GeneralCase materialFully gasketed, aluminum housing, steel back panel, plastic access panelPhysical dimensions10.7″ × 14.4″ × 4.0″ (27.06 cm × 36.66 cm × 10.1 cm)Weight14.13 lbs (6.4 kg)Water ratingIPX7Temperature rangeFrom 5° F to 158° F (from -15° C to 70° C)Electrical FeaturesPower input10-32 VPower usage120 W maximumFuse15ASonar FeaturesFrequencies supportedDual channel CHIRP: 33-250 kHz (transducer dependent)Transmit power300W–3kW rms (transducer dependent)Maximum depth10,000 ft (3,048 m)xCHIRPyesRapid returnyesConnectionsGarmin Marine Network Ports1 (Garmin BlueNet)Sonar connections2 bare wireIn the Box
GSD 28
Power cable
Garmin BlueNet marine network cable (6 ft) with legacy network adapter
Field installable adapter kit for the Garmin BlueNet network
Mounting hardware
Documentation
Accessories Adapters
Cables & Chargers
Connectors
Networking Hardware
Transducers
View All
AdaptersCables & ChargersConnectorsNetworking HardwareTransducersCompatible Devices GPSMAP 1022GPSMAP 1022xsvGPSMAP 1042xsv GPSMAP 1222GPSMAP 1222xsvGPSMAP 1223