Transducers act as both a powerful speaker and a sensitive microphone, transmitting sonar signals into the water and listening for echoes returned from the bottom and other submerged targets.
Most transducers must be exposed directly to the water in order to function; common installations involve mounting through a hole drilled in your hull, transom-mounting below the waterline, or external mounting in a specially designed keel or hull pocket. Alternatively, solid fiberglass hulls permit the use of in-hull tank mounted or ‘shoot-thru-hull’ transducers, which are mounted on the inside surface of the hull and fire a sonar signal straight through to the water below.
Your boat’s hull type will determine the transducer mounting styles available to choose from. Selecting the right style then means finding your ideal balance between transducer performance, vessel performance, installation cost and complexity.