Nomad Team Finds Wreck of SS Cornwallis Off Maine
The 1944 sinking by a German U-boat that landed spies in Maine has been located about 400 feet deep, roughly 25 miles offshore.
Updated on Nov. 6, 2026 in Geography
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On July 11, 2026, the Nomad Exploration Team located the wreck of the SS Cornwallis, a 5,458-ton steamer sunk by German submarine U-1230 on December 3, 1944. The wreck lies near Mount Desert Rock, Maine, about 400 feet below the surface.
Why it matters
The discovery resolves the location of a ship tied to a wartime espionage operation that brought Nazi spies onto the Maine coast. It also documents a sinking in which 43 crew members died and only five of 48 people aboard reached shore.
Side-scan sonar surveying more than 50 square miles of seabed located the SS Cornwallis about 400 feet deep, roughly 25 miles off Maine, where 43 of 48 people aboard died in 1944. The reporting does not describe further survey results beyond the identification of the wreck.
The players
Nomad Exploration Team
A private exploration group that conducted the multi-year search and surveyed the seabed with side-scan sonar to locate the wreck.
U-1230
A German Kriegsmarine submarine that landed two Nazi spies in Maine as part of Operation Elster before sinking the SS Cornwallis.
The details
The Nomad team narrowed its search to three possible regions using archival research and side-scan sonar, then identified the wreck by comparing it to the ship's blueprints. The SS Cornwallis had been torpedoed near Barbados in September 1942 before U-1230 sank it less than 10 minutes after the strike in 1944.
Timeline
September 1942: SS Cornwallis torpedoed near Barbados.
December 3, 1944: U-1230 torpedoes and sinks the SS Cornwallis.
2019: Nomad team begins its multi-year search.
July 11, 2026: Nomad team locates the wreck.
Season Trajectory
The wreck's location ties directly to the U-boat landings of Operation Elster, a documented German effort to place spies on the American coast during the Second World War. The find adds a physical record of that operation's maritime side to the historical account.
For anyone interested in the region's history, the wreck offers a tangible site tied to wartime events that reached the Maine coast. Divers exploring waters near Mount Desert Rock should note the reported conditions, including a tidal current of about 10 knots and a bottom water temperature near 42 degrees Fahrenheit.
The takeaway
The find shows how archival blueprints and modern sonar can together recover the location of a wartime wreck decades after it went down. It also keeps a record of the 43 lives lost and of the espionage operation that brought the U-boat to Maine's coast.
What happens next
The Nomad team plans to return to the wreck for further exploration using a remotely operated underwater vehicle, though no date for that return has been reported.
Further reading
Explore more on the Geography coverage of how coastal waters and seabed features shape the history of places like Maine.
Source note: This article includes information reported by Gizmodo.
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