homing torpedo: a torpedo that is guided to its target (as by the sound of a ship's engines)
torpedo: armament consisting of a long cylindrical self-propelled underwater projectile that detonates on contact with a target
toggle: a fastener consisting of a peg or pin or crosspiece that is inserted into an eye at the end of a rope or a chain or a cable in order to fasten it to something (as another rope or chain or cable)