USS Squalus (SS-192) Salvage Operations, 1939
Blowing of salvage pontoons to lift Squalus off the sea bottom, 12 August 1939. Photographed by the Portsmouth Navy Yard, Kittery, Maine. Original photo is mis-identified as showing salvage of USS Sculpin, which was present to support the operations, but was not the object of them. U.S. Naval History and Heritage Command Photograph.