Abstract: The invention relates to a water discharge device for a system for launching objects, including torpedoes, mines, or missiles, from at least one tube built into a fixed or movable submerged structure (e.g., a submarine). The tube is provided with at least one end door and one slide valve connecting it hydraulically to the water ram by a impulse tank filled with water. The impulse tank is built into the submarine hull, and comprises a closed, sealed space in which the water is driven to the tube, under the influence of a leading pneumatic ram acting on a following hydraulic ram controlled by the water contained in the chamber and previously drawn in from the marine environment by an intake line. The chamber is immovably located outside the hull.

Abstract: An air venting device is provided in a container with a sealed closure sucted to uncontrolled oscillations and designed to be filled by water. The air venting device includes an outside tube with a water presence indicator and an isolating valve to close off the outside tube in response to the water presence indicator and an inside tube with two open ends located at two different points in the container. One of the ends of the inside tube is fitted with a closure flap to close off the opening of the tube once the water in the container reaches a predetermined level through the action of a float. This end allows the air to enter even when the container is subjected to oscillations and so long as it is not completely full. This air venting device may be used in torpedo tubes of a submarine, for example.