This mid-range 1 kW 8-pin transducer with a narrow beam is good for deep water and bottom definition. It has a depth of 1,500 to 2,200 ft; an operating frequency of 50 to 200 kHz; a beamwidth of 14x23 to 3x5 degrees; and a 0 to 26 degree deadrise.
Transducer kit comes with installation instructions. Follow the instructions carefully to avoid damaging your boat.
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Garmin Bronze Thru-hull Mount Transducer with Depth & Temperature (8-pin) - Airmar B258