Abstract: An interdiction system to be placed upon the floor of the ocean includes a arget detection and classification system which is cooperatively connected to a hollow enclosure containing a predetermined volume at one atmosphere or less pressure. Upon target aquisition and classification, the detection and classification system actuates a mechanism to rupture the wall of the hollow enclosure. The resultant implosion caused by the ambient ocean pressure creates a high intensity shock wave in the vicinity of the system to damage the intruding vessel.

Abstract: A method and apparatus deploys a hydrophone array in a predetermined patt. A master buoy includes a float and an anchor which hold a central portion at a predetermined depth in the water. A number of hydrodynamically shaped glide vehicles are disengaged from the central portion and glide radially outwardly from it. When the glide vehicles come to rest, strings of hydrophones are released and buoyed along the bottom in a preestablished pattern. Acoustic energy impinging on the hydrophones, optionally is fed to a transmitting unit on the float or to a remote installation via a cable lying on the bottom.

Abstract: A method and apparatus deploys a hydrophone array in a predetermined patt. A master buoy includes a float and an anchor which hold a central portion at a predetermined depth in the water. A number of hydrodynamically shaped glide vehicles are disengaged from the central portion and glide radially outwardly from it. When the glide vehicles come to rest, strings of hydrophones are released and buoyed from the bottom in a preestablished pattern. Acoustic energy impinging on the hydrophones, optionally is fed to a transmitting unit on the float or to a remote installation via a cable lying on the bottom.

Abstract: A ship's bottom inspection apparatus which includes a generally U-shaped mework which is adapted to be submerged for receiving the width of a ship therebetween. A series of cameras are mounted in a spaced relationship along the framework to view vertically upward. A series of lights are mounted in a spaced relationship along the framework at an acute angle to vertical and directed generally toward the viewing area of the cameras so that backscattering is minimized while ship bottom discontinuities are made evident by shadow effects. In this manner multiple photographs can be taken of the ship's bottom to display any possible structural defects.

Abstract: A portable submerged structure uses fluid pressure to extend a plurality of lexible conduits until the conduits become rigid. In such a rigid configuration the flexible conduits provide a rigid support which is independent of any further moorings or other conventional structure used to obtain rigidity. The invention discloses the use of an open form of independent conduits as well as conduits which are joined to provide a closed geometric figure. A packaging and deploying system using a fluid released container is also disclosed.

Abstract: A benthic bobbing buoy system which includes an anchor, a buoy, and an anr line connecting the buoy to the anchor, the anchor line being of a length to establish the buoy at a submerged position. Another buoy for bobbing between the surface of the water and a submerged position is connected by another line to the submerged buoy. Provision is made for selectively changing the buoyancy of the bobbing buoy between a positively buoyant condition to a less positively buoyant condition, and provision is made for limiting the descent of the bobbing buoy when the bobbing buoy is less positively buoyant. With such an arrangement the bobbing buoy can repeatedly bob between the surface of the water and a predetermined depth.