Operating at dockside at the Boston Naval Shipyard, Charlestown, Massachusetts, with a diver and crew assisting, 12 June 1963. Barge YC-764 is at right, and USS Billfish (SS-286) is in the center distance. Photographed by Belcher, Mobile Photo Group. View was probably taken during tests supporting the investigation into the loss of USS Thresher (SSN-593). U.S. Naval History and Heritage Command Photograph.