A naval mine configured to be released by a release assembly comprising: an impermeable casing; an explosive charge arranged inside the impermeable casing; a detonator which can be operated to trigger the explosive charge; and a control device configured to operate the detonator. The naval mine further comprises a fillable chamber, provided with at least one opening and a closing system for closing or opening the opening; said closing system is configured to open the opening so as to allow water to flow into the fillable chamber, when the naval mine is released by the release assembly.

A naval mine configured to be released by a release assembly comprising: an impermeable casing; an explosive charge arranged inside the impermeable casing; a detonator which can be operated to trigger the explosive charge; and a control device configured to operate the detonator. The naval mine further comprises a fillable chamber, provided with at least one opening and a closing system for closing or opening the opening; said closing system is configured to open the opening so as to allow water to flow into the fillable chamber, when the naval mine is released by the release assembly.

An underwater vehicle includes a plurality of releasable panel members that are initially in a storage state in which the releasable panel members form a closed housing and the underwater vehicle is neutrally buoyant, an actuatable effector that is retained in the closed housing. The effector has an anchor and a positively buoyant upper unit opposite the anchor. When the plurality of releasable panel members are released to open the closed housing, the effector is separable from the releasable panel members and maintained in a vertically downward direction by the anchor and the positively buoyant upper unit.

An underwater vehicle includes a plurality of releasable panel members that are initially in a storage state in which the releasable panel members form a closed housing and the underwater vehicle is neutrally buoyant, an actuatable effector that is retained in the closed housing. The effector has an anchor and a positively buoyant upper unit opposite the anchor. When the plurality of releasable panel members are released to open the closed housing, the effector is separable from the releasable panel members and maintained in a vertically downward direction by the anchor and the positively buoyant upper unit.