Abstract: A weapons-handling and discharge system for a submarine which comprises a rotatable rack for attachment around the exterior of the pressure hull of a submarine, canisters to contain weapons, an exterior casing provided around the pressure hull, forward or rearward facing apertures in the casing, and a mechanism for discharging the weapon from the canister and through the aperture. The canisters are located between the pressure hull and the exterior casing and are locked to the rack.