Thru-Hull mount transducers are bolted through the hull of the boat forward of the prop. Ideal for the larger boats, especially for the in-board motors. Sound waves are shot into the water by a sensor, also known as a transducer. Fish, depth and underwater terrain can be detected by the fisherman on the boat. Transducers are attached to your boat in several different ways.
This small and economical Garmin in-hull transducer is a plastic Airmar P72 housing style transducer with a depth only sensor.