SS United States is a luxury passenger liner built in 1952 for the United States Lines designed to capture the trans-Atlantic speed record. Built at a cost of $78 million,[6] the ship is the largest ocean liner constructed entirely in the U.S., the fastest ocean liner to cross the Atlantic in either direction, and even in her retirement retains the Blue Riband given to the passenger liner crossing the Atlantic Ocean in regular service with the record highest speed. Her construction was partially subsidized by the U.S. government, since she was designed to allow conversion to a troop carrier should the need have arisen.[6] United States operated uninterrupted in transatlantic passenger service until 1969; since 1996 she has been docked at Pier 82 on the Delaware River in Philadelphia.