Airmar B60 20° Bronze Thru-Hull Mix & Match Cable NeededMeet the Airmar B60 20 MM Bronze Thru Hull Transducer a high performance depth and temperature sensor built for center console and trailered boats. This 600 W, dual frequency unit features Airmars Tilted Element technology, with the ceramic element fixed at a 20 angle inside the housing. Installed nearly flush with the hull, the tilt corrects for deadrise so the beam is directed straight down for maximum echo returns and the most accurate depth