For nearly three decades, drivers heading to the big-box stores in South Philadelphia passed a ghost. Tied up at Pier 82 on the Delaware River was a huge, rust-streaked ship with two red, white and blue funnels, longer than the Titanic and taller than most buildings in the area. Plenty of locals had no idea what it was.
It was the SS United States, once the fastest passenger ship in the world. Next month, if the schedule holds, she’ll make her final trip, out into the Gulf off northwest Florida, where she’ll be deliberately sunk to become the world’s largest artificial reef.
The fastest liner ever built
The SS United States entered service in 1952. On her maiden voyage that July, she crossed the Atlantic faster than any passenger liner before her, averaging about 35.6 knots (around 41 mph) eastbound. That earned her the Blue Riband, the unofficial prize for the fastest Atlantic crossing.
More than 70 years later, no ocean liner has beaten that record. Some smaller, purpose-built high-speed vessels have crossed faster since, but among traditional passenger liners, her record still stands.
Her speed came from clever engineering. Designer William Francis Gibbs used aluminum for much of the ship’s upper structure, which made her far lighter than earlier liners. Her steam turbines produced enormous power. She was also built with US Navy support so she could be quickly converted into a troopship if needed, which meant many of her performance details were kept secret for years.
From glamour to a long goodbye
For a while, she was the height of style. Presidents, movie stars and royalty sailed on her. But by the late 1960s, jet airliners could cross the Atlantic in hours instead of days, and passengers stopped choosing ships. The SS United States made her last commercial voyage in 1969.
What followed was decades of drifting between owners and plans. Developers proposed turning her into a cruise ship, a hotel, a museum or a mixed-use building. None of the plans got far enough, mostly because of the huge costs involved. She arrived at Pier 82 in Philadelphia in 1996 and stayed there until February 2025.
Her last owner, the SS United States Conservancy, spent years trying to save her. A long rent dispute with the pier’s landlord eventually forced the ship to move. In 2024, Okaloosa County, Florida, bought her for $1 million with a plan to sink her as a reef and dive attraction.
How you turn a liner into a reef
You can’t just open the valves on a 1950s ocean liner and let her go down. Old ships are full of things that don’t belong on the seabed, from fuel residue to wiring, plastics and other materials.
So after leaving Philadelphia, the ship was towed to Mobile, Alabama, for a long cleanup. Crews there removed chemicals, wiring, plastics and glass to prepare her for life underwater. Parts of the upper structure, including her aft funnel, were also cut away. Okaloosa County says the project meets Environmental Protection Agency standards for artificial reefs.
The sinking itself will be carefully controlled. Ships turned into reefs are usually prepared so that water floods in evenly in specific places, helping them settle upright on the seabed rather than rolling over. The aim is a stable structure that stays put for decades. The site is about 22 nautical miles southwest of Destin-Fort Walton Beach.
Why sink a ship on purpose?
Artificial reefs can give marine life something hard to grow on and shelter in, especially on sandy seafloors with little natural structure. Over time, a sunken ship gets covered in corals, sponges and other organisms, and attracts schools of fish. Okaloosa County already manages hundreds of artificial reefs, including several smaller shipwrecks.
There’s an economic angle too. The county is betting that a famous, giant wreck will draw divers and anglers from around the world. Nearby, the aircraft carrier USS Oriskany was sunk off Pensacola in 2006 and has become a popular dive site. Once the SS United States goes down, she’ll take over the title of the world’s largest artificial reef.
The total project, including buying, moving, cleaning and sinking the ship, is budgeted at roughly $10 million.
Not everyone is happy about it
For many preservationists, sinking the ship feels like a loss. Some groups fought to keep her afloat, including through legal challenges, though a federal lawsuit was dismissed in 2025. Okaloosa County has argued that without the reef plan, the realistic alternative was the scrapyard.
The sinking date has also slipped before. It was originally expected in early 2026 before federal approvals delayed it. The current plan is the second week of November, but officials say the exact day depends on weather and other logistics.
A different kind of afterlife
When she goes down, the SS United States will stop being a ship in any practical sense. But she won’t disappear. Divers will be able to swim along her decks, and marine life will gradually take her over. For a vessel famous for crossing the ocean faster than any liner before or since, it’s a strange final role: sitting perfectly still at the bottom of the sea.