Airmar P79 NMEA 2000 In-Hull 235 kHz [P79-235-N2]P79 NMEA 2000 In Hull 235 kHz The P79 in hull transducer easily adjusts to hull deadrise angles up to 22 . This ensures that the beam is vertically oriented to receive echos, resulting in accurate depth readings. Unlike traditional "puck" type transducers, our P79 consists of a base that is bonded to the hull and filled with liquid. The separate transducer then attaches to the base with a twist lock. The sound waves travel more efficiently though the