Underwater weapon systems

An underwater weapon system comprising a self-propelled weapon, an elongate enclosure for the weapon, the weapon having first and second opposite ends, a center of gravity disposed between said ends and a center of buoyancy disposed between said ends, the center of buoyancy being located between the center of gravity and said first end of the weapon whereby the weapon sinks in seawater with said first end uppermost and said second end lowermost, the weapon enclosure at said second end having rotary material displacing means thereon for cutting into and displacing material on the sea bed from beneath the container to allow the weapon to sink into the sea bed, the enclosure for the weapon comprising an outer elongate container and an inner water-tight container disposed within the outer container and containing the weapon and further comprising ejection means for causing the weapon to break out from the enclosure through the sea bed overlying the enclosure to activate the weapon.