Transom Transducers mount on the transom (back) of the boat in contact with the surface of the water. To prevent damage to the boat or transducer. Transom mount hardware is included with the transducer. Humminbird XNT-9-DB-74-T Transom Mount Transducer: Mount on the transom (Back of the boat)The impact release feature pivots transducer out of the way if struck by an object. For use with: 1159ci HD XD, 959ci HD XD, 859ci HD XD, 688ci HD XD, 678c HD XD.
