The ship had been inactive for years despite various owners attempting to save and restore it. The historic SS United States ocean liner has taken its final trip, this time to the bottom of the ocean, as it becomes part of an artificial underwater reef. The nearly 1,000-foot (302m)-long vessel, the fastest ocean liner in the world, was sunk on Wednesday after its hull was hollowed out to ensure it remains on the ocean floor, in a process also known as scuttling.