Historic SS United States Sinks to Become World's Largest Artificial Reef

The historic SS United States reached the end of its journey at sea on Wednesday, sinking off the coast of Destin, Florida, to begin a new life as the world’s largest artificial reef.

The nearly 1,000-foot American-made vessel, which once held the title of the fastest ocean liner in the world, was deployed at approximately 2:40 p.m. ET, according to reports from Interesting Engineering. After openings were cut into the hull to facilitate an upright descent, the sinking process began shortly before 5 p.m. The massive structure gradually filled with water over several hours before finally resting on the seabed around 10 p.m.

Historic SS United States sinks off Florida's Gulf Coast — CBS Philadelphia

This transition from a floating icon to a submerged habitat marks a definitive end to decades of uncertainty regarding the ship’s survival. While preservationists fought to keep the vessel afloat, the economic reality of its upkeep eventually dictated this final, watery transformation.

A legacy of speed and rising costs

Launched in 1952, the ship made history by setting a transatlantic speed record during its maiden voyage. It served as a premier vessel, carrying thousands of passengers across the Atlantic for 17 years before it was retired in 1969, The Guardian reported.

Historic SS United States Ocean Liner Sunk Off Florida to Become Artificial Reef — DWS News

For years after its retirement, the ship remained docked in Philadelphia. Various owners attempted to find ways to save or restore the vessel, but the financial burden of maintaining such an aging giant proved insurmountable. In 2021, port authorities increased the daily dockage fee to $1,700, a cost that the non-profit SS United States Conservancy could no longer afford, according to The Guardian.

The ship’s fate shifted in 2024 when Florida’s Okaloosa County purchased the vessel for $1 million. The county intended to convert the liner into a massive artificial reef to support local marine life and tourism.

Historic SS United States Sinks to Become World's Largest Artificial Reef — Photo: interestingengineering.com

New life beneath the waves

The ship will now rest at a depth of approximately 180 feet, with its upper decks sitting about 55 feet below the surface. This positioning is expected to turn the site into a major destination for recreational divers visiting the Florida Gulf Coast.

Beyond tourism, the structure serves a critical biological purpose. Officials expect the hull to provide a vital habitat for various marine species, including:

Historic ocean liner SS United States to be sunk off Florida to become artificial reef — Reuters

Red snapper
Grouper
Amberjack
Mackerel
Tuna

The project aims to balance the loss of a physical monument with the creation of a “vibrant and dynamic marine habitat,” as Susan Gibbs, president and co-founder of the conservancy, explained. She said that the reefing process, combined with a planned land-based museum and visitor experience, will honor the ship’s history in a moving way.

“His relationship with the ship was, I would say, a full-bore obsession. He would joke that he loved the SS United States a thousand times more than my grandmother. He would see the ship off every time she set sail for Europe, and be one of the first to greet her on her return,” said Susan Gibbs, reflecting on her grandfather, William Francis Gibbs, who designed the vessel.

While the sinking marks the end of the ship’s era as a passenger liner, the transformation ensures the vessel remains a permanent fixture of American maritime history, even if it is no longer visible from the surface.