The fastest ocean liner ever built took its time going down. On Wednesday afternoon crews began flooding the SS United States about 22 miles off Destin on Florida’s Panhandle, using openings cut into the hull rather than explosives so that the ship would settle upright. It was close to 10pm local time before the nearly 1,000-foot vessel finally came to rest on the floor of the Gulf of Mexico.

She now lies in roughly 180 feet of water, with her upper decks about 55 feet below the surface, close enough for recreational divers. Okaloosa County, which bought the ship for around $1 million in 2024, is betting on a new habitat for grouper, red snapper, amberjack and tuna, and on a steady stream of dive tourists. Local charters are already lining up trips, and a land-based museum is planned to tell her story.

That story began in 1952, when the liner crossed the Atlantic eastbound in about three and a half days and took the Blue Riband. That eastbound record still stands more than seven decades later. Until her retirement in 1969 she carried presidents including Truman, Eisenhower and Kennedy, and a parade of stars from Duke Ellington to Walt Disney.

The decades afterwards were less glamorous. The ship sat at a Philadelphia pier from 1996, as plans for a hotel or museum fell through. When the daily docking fee climbed to $1,700, her nonprofit owners could no longer keep up, and in 2025 she was towed to Mobile, Alabama, to be stripped of fuel, wiring and pollutants.

The liner was the life’s work of naval architect William Francis Gibbs. His granddaughter Susan, who leads the conservancy, recalled that he joked he loved the vessel far more than his wife and described his devotion as “a full-bore obsession”. Former passengers watched with mixed feelings, hoping the memory would outlast the steel.