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.
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| 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 |
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Garmin 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. |
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TRANSDUCER 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. |
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SONAR 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. |
| General | |
| Case material | Fully gasketed, aluminum housing, steel back panel, plastic access panel |
| Physical dimensions | 10.7″ × 14.4″ × 4.0″ (27.06 cm × 36.66 cm × 10.1 cm) |
| Weight | 14.13 lbs (6.4 kg) |
| Water rating | IPX7 |
| Temperature range | From 5° F to 158° F (from -15° C to 70° C) |
| Electrical Features | |
| Power input | 10-32 V |
| Power usage | 120 W maximum |
| Fuse | 15A |
| Sonar Features | |
| Frequencies supported | Dual channel CHIRP: 33-250 kHz (transducer dependant) |
| Transmit power | 300W–3kW rms (transducer dependant) |
| Maximum depth | 10,000 ft (3,048 m) |
| xCHIRP | yes |
| Rapid return | yes |
| Connections | |
| Garmin Marine Network Ports | 1 (Garmin BlueNet) |
| Sonar connections | 2 bare wire |
