FREE SHIPPING!! A powerful analog sonar, is a robust unit designed to operate with stand-alone chartplotters or integrate with the Garmin CANet and Marine Networks. Exceptional performance in water as shallow as one foot on down to depths of 1,500 feet. The GSD 21 can connect to dual-frequency transducer for deep-water performance or a dual-beamwidth transducer (narrow/wide) for operation in shallow freshwater as well as deep water.Map/List $249.99 VIEW OUR PRICE, CLICK ON CART Product SKU/Part Number: 010-00502-00
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