Raymarine P48 Transom Mount Transducer For A Series. Engineered for shallow water coastal, lake, and river fishing, the unique FanBeam transducer delivers an extra wide view of the bottom. In addition to a very wide beam, the FanBeam can be rotated fore and aft or port and starboard with an easy-to-use rotary beam control built right into the top of the transducer housing. The FanBeam transducer is designed for transom or trolling motor mounting and features a built in temperature sensor. Compatible hull material: wood, fiberglass, or aluminum.