Abstract: 1. In a mechanism for sweeping a pressure controlled mine arranged within a ody of water comprising a plurality of water entraining devices, each of said devices comprising a pair of pressure plates, a plurality of bracing members for maintaining the pressure plates of each pair in predetermined fixed space relation with respect to each other, a plurality of flexible tension members interconnecting said pairs of pressure plates whereby the plates are adapted to cause the water entrained between said plates to be moved sufficiently to reduce the pressure of the water adjacent the mine to a predetermined value as the mechanism travels over the mine, and means for causing movement of said mechanism above the mine.

Abstract: 1. In a mooring device for an aerial launched mine adapted to be dropped into a body of water, in combination, a buoyant member, a casing releasably locked to said member and separable therefrom upon impact of the device with the water, locking means including a plurality of detents carried by said casing for releasably locking the casing to said member, impact responsive means mounted on the casing for releasing said locking means in response to said impact, and a length of mooring cable arranged to be payed out as the casing separates from said member and sinks to the bed of the body of water for mooring the mine beneath the surface of the water.