Salvaging a sunken submarine.
Full title reads: "SALVING A SUBMARINE. Difficult task successfully accomplished by use of compressed air".
Bridgeport (possibly Connecticut, U.S.A.) .
Various panning shot of sunken submarine being raised from sea by cranes on salvage barge. L/S of deep sea divers climbing down side of boat into sea. Various M/Ss of submarine emerging, a few men stand on top of it.