Accession Number : AD0164032

Title :   Salvage Pontoon.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Fishel,Kenneth R.

Report Date : 11 AUG 1970

Pagination or Media Count : 6

Abstract : The patent relates to a salvage pontoon which has a negative metacentric height during its lift phase so that if the payload becomes accidentally detached during the lift phase the pontoon will rotate and fill with water through its open bottom end for a safe ascent to the surface. The pontoon includes a lift tank which is open at its bottom and closed at its top. A negative buoyancy control tank and a positive buoyancy tank are mounted to the top portion of the lift tank. The pontoon has a negative metacentric height and positive buoyancy when the lift tank, positive buoyancy tank, and negative height and positive buoyancy when the lift tank, positive buoyancy tank, and negative buoyancy control tank are dewatered.

Descriptors :   (*FLOATS, *PATENTS), (*UNDERWATER EQUIPMENT, SALVAGE), BUOYANCY, BALLAST TANKS, FILLING

Subject Categories : Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE