Abstract: A countermeasure launcher system, for use by a submarine, reducing any detectable signature by preventing the escape of pressurized gas into seawater at the forward end of the system's launch tube upon launching a countermeasure. The pressurized gas that is used in launching the countermeasure is trapped within the launch tube by a unique arrangement of specific components. The pressurized gas is then permitted to slowly exit at a later time via a pressure relief valve in the launch tube's wall.

Abstract: A launching mechanism is provided for ejecting a small buoy from a high sd deep depth submersible. The buoy is held in place and constrained by a pair of latch levers that lock into a groove in the buoy tail piece. The latch levers are held in place by locking pins. On launch a solenoid valve is operated allowing ambient sea pressure to actuate a release system. The sea pressure retracts a release piston assembly to which the locking pins are attached. Upon withdrawal of the locking pins, the latch levers are released by the force of neg'ator ejection springs. The ejection springs accelerate an open ended cage containing the buoy through a four foot displacement. The buoy strikes a plunger actuating a muzzle plug release mechanism that permits ejection of the buoy from the launch cage.