USS Philadelphia (SSN-690)
USS Philadelphia (SSN-690), a Los Angeles-class attack submarine, was the sixth ship of the United States Navy to be named for Philadelphia, Pennsylvania. The contract to build her was awarded to the Electric Boat Division of General Dynamics Corporation in Groton, Connecticut on 8 January 1971 and her keel was laid down on 12 August 1972. She was launched on 19 October 1974 sponsored by Mrs. Hugh Scott, and commissioned on 25 June 1977, with Commander Robert B. Osborne in command.
In 1988, Philadelphia became the first submarine to receive TLAM-D capability.
In 1994, Philadelphia completed the first refueling overhaul of a Los Angeles-class submarine. This was completed at Portsmouth Naval Shipyard in Kittery, Maine.
In 1998, Philadelphia was modified to carry a Dry Deck Shelter (DDS).
On 5 September 2005 Philadelphia was in the Persian Gulf about 30 nautical miles (60 km) northeast of Bahrain when it collided with a Turkish merchant ship, MV Yasa Aysen. No injuries were reported on either vessel. Damage to the submarine was described as "superficial." The Philadelphia's Commanding Officer, CDR Steven M. Oxholm, was relieved following the incident. The Turkish ship suffered minor damage to its hull just above the water line, which the United States Coast Guard inspected and found still seaworthy.
In 2006, Philadelphia completed the first-ever Pre-Inactivation Restricted Availability (PIRA) conducted at Portsmouth Naval Shipyard in Kittery, Maine.
On July 20, 2009 the US Navy announced that the submarine would be inactivated on June 10, 2010 and decommissioned at an undetermined later date.