Garmin
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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
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.
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.
When the seas get rough, use the MSC™ 10 external satellite compass (sold separately) to greatly reduce wave and swell from your sonar returns.
This sonar module is compatible with a wide range of Garmin and AIRMAR® transducers (sold separately).
The GSD 28 module is ideal for retrofitting to boats with existing bare wire transducers.
GSD 28 can output 300 watts to 3 kW at extreme depths1.
The module supports dual-channel CHIRP (up to 3 kW per channel).
The GSD 28 sonar module can operate in the 33 to 250 kHz frequency range1.
GSD 28 is rated for harsh marine environments and water-resistance with an IPX7 rating.
| Feature | Specification |
| 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 dependent) |
| Transmit power | 300W–3kW rms (transducer dependent) |
| 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 |
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