USS Pittsburgh (SSN-720) is a Los Angeles-class submarine and was the fourth ship of the United States Navy to be named for Pittsburgh, Pennsylvania. The contract to build Pittsburgh was awarded to the Electric Boat Division of General Dynamics Corporation in Groton, Connecticut on 16 April 1979 and her keel was laid down on 15 April 1983. She was launched on 8 December 1984
USS Boise (SSN-764), a Los Angeles-class submarine, was the second ship of the United States Navy to be named for Boise, Idaho. The contract to build her was awarded to Newport News Shipbuilding and Dry Dock Company in Newport News, Virginia on 6 February 1987 and her keel was laid down on 25 August 1988. She was launched on 23 March 1991
A chief petty officer talks to the helmsmen aboard the nuclear-powered attack submarine USS PARGO (Sturgeon Class) as CDR David W. Hearding, the submarine's commanding officer, looks through the periscope. The PARGO is underway north of the Arctic Circle.