Garmin GSD28 Sonar ModuleThe Garmin GSD28 Sonar Module is a rugged, high powered sonar box designed for serious sport anglers upgrading their boat for deep water imaging. With next generation xCHIRP technology and RapidReturn, it delivers ultra clear arches, superb target separation, and fast bottom updates for confident lure placement and trophy catches. Frequencies supported: Dual channel CHIRP: 25250 kHz (transducer dependent) Transmit power: 300 W3 kW RMS (transducer
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