Foam Floats Sunken Hull
October 1963…
Sunken ships might be raised quickly and economically, according to this recent patent, by pumping in foam. A diver would locate or prepare a closed compartment, insert a hose and nozzle. Pumps on a salvage ship would force in resin and catalyst. Combined at the nozzle, they’d set up to form a buoyant, closed-cell foam.
