High Quality Content by WIKIPEDIA articles! USS Dolphin (AGSS-555) was the United States Navy`s only operational diesel-electric, deep-diving, research and development submarine. Her keel was laid down on 9 November 1962 at the Portsmouth Navy Yard, Kittery, Maine. She was launched on 8 June 1968 sponsored by Mrs. Daniel K. Inouye (the wife of the senator for Hawaii), and commissioned on 17 August 1968 with Lieutenant Commander J.R. McDonnell in command. Despite her recent repair and upgrade, Dolphin was decommissioned on 15 January 2007 and was struck from the Naval Vessel Register on the same date. She is now a museum ship in San Diego Bay under the management of the San Diego Maritime Museum.