An in-hull (aka shoot-through) transducer mounts to the inside of the hull and transmits and receives sonar signals through fiberglass, eliminating the need for drilling holes in the hull. This also ...

It don’t mean a thing if ain’t got that ping. With apologies to the first lady of song, the late great Ella Fitzgerald, that sums up fish-finder performance. The world’s finest sonar is useless ...