The U.S. Navy officially transferred the decommissioned research submarine ex-Dolphin (AGSS 555) to the Maritime Museum of San Diego (MMSD) during a donation contract signing ceremony Sept. 18 in Washington. The ceremony took place in the Washington office of U.S. Rep. Susan Davis. Ex-Dolphin was decommissioned in 2007 after more than 30 years of service supporting naval research activities from her homeport in San Diego. "As a museum, Dolphin will highlight America's technical expertise and dedication to the advancement of science," said Capt. David Tungett, program manager for the Navy's inactive ships program. Ex-Dolphin was one of the world's deepest diving submarines with a maximum operating depth in excess of 3,000 feet.