(SS-109) In dry dock at the Boston Navy Yard, Charlestown, Massachusetts, circa 19 March 1928, following salvage. Original caption reads: As the waters in the drydock receded, a wide, deep indentation in the starboard side of the S-4, forward of the gundeck at the battery compartment, was exposed. Photo shows the huge dent made when the submarine was struck by the Coast Guard destroyer Paulding. U.S. Naval History and Heritage Command Photograph.