Abstract: A sonar transducer assembly for a fishing boat provides electrical signals corresponding to an image of the area surrounding the boat on both sides thereof based on sound echoes received by the transducer assembly. The transducer assembly comprises a transducer housing mounted on the transom of the boat so that the bottom surface thereof is at substantially the level as the hull of the boat in the normal position of the transducer housing, and such that the transducer housing can move rearwardly and upwardly in response to hitting an object in the water. The housing is generally bullet-shaped and houses a plurality of individual transducers directed in different directions away from the hull of the boat so as to provide scanning of areas of the water beneath and on both sides of the boat.

Abstract: A sonar fish finder system is provided for a boat for determining and displaying the location of fish in the body of water surrounding the boat. The system includes an electromechanical transducer assembly for transmitting sound waves in the body of water along separate paths in different directions into separate areas of the body of water, for receiving corresponding echoes from obstructions in the paths (including echoes from any fish in the paths) and for generating electrical signals in accordance with the received echoes. Electrical transmitters connected to the transducer assembly control transmission of the sound waves and receivers, connected to the transducer assembly, receive and process the electrical signals produced thereby.