"The object of my invention is to provide a torpedo boat which will start from a given point in the water and travel therefrom to a distant ship or similar object without any one on board and without any connection with the point of starting. To this end the invention relates to a torpedo boat equipped with a mariner's compass which controls an electric current which in turn operates a rudder whenever the boat steers either to the right or left from the course in which it has been adjusted."