B63C 2007/125

Salvaging of disabled, stranded, or sunken vessels; Salvaging of vessel parts or furnishings, e.g. of safes; Salvaging of other underwater objects in which lifting action is generated in or adjacent to vessels or objects by bringing air or floating bodies or material into vessels or objects {using buoyant masses, e.g. foams, or a large plurality of small buoyant objects}