Divers discover SS Cornwallis shipwreck off Maine coast
Lying nearly 400 feet below the surface in the Gulf of Maine, the shipwreck of the SS Cornwallis was discovered on July 11, 2026, by the Nomad Exploration Team after a seven-year search, ending decades of mystery surrounding the Canadian steamship torpedoed by a German submarine during World War II, The Boston Globe reported.
Locating the Wreck After a Seven-Year Search
The discovery came as the team’s sonar system detected the vessel about 100 yards before the end of their search grid, roughly 10 miles west-southwest of Mount Desert Rock. The team deployed a sophisticated side-scan sonar device to the seafloor, capturing detailed images that confirmed the identity of the 5,458-ton merchant ship. The vessel rests at a depth of almost 120 meters—about 400 feet—according to Divernet.
Previous expeditions had failed to locate the site. Maritime historian Eric Wiberg noted that the successful find is a remarkable achievement given the difficult ocean conditions and the expertise required for North Atlantic shipwrecks.
Diving the Cold Depths of the Gulf of Maine
Allan was among the first technical divers to descend to the Cornwallis on August 22, describing the initial dive as terrifying due to immense pressure and pitch-black conditions. Water temperatures near the seafloor ranged between 38 and 42 degrees, and divers spent slightly more than 20 minutes at the wreck before enduring a two-and-a-half-hour decompression ascent. Strong tidal currents complicated the ascent back to the surface.
Despite the harsh environment, the team found the ship in relatively good condition with minimal marine growth, though surrounding silt limits visibility. Allan observed cranes on the ship’s deck during the initial descent.
German Submarine Torpedoes Canadian Vessel Carrying Sugar and Molasses
Built in Vancouver, British Columbia, and originally launched in 1921 as the Canadian Transporter, the 400-foot vessel later operated under Canadian National Steamships. On December 3, 1944, the ship was travelling from Barbados to St. John, New Brunswick, carrying bags of sugar and barrels of molasses with 48 people on board. A torpedo fired by the German submarine U-1230 struck the forward cargo hold, sinking the vessel in less than 10 minutes.
Forty-three people died in the attack. Five survivors escaped on life rafts, were spotted by aircraft, and were eventually picked up by fishing boats before transferring to a U.S. Navy rescue vessel in Rockland, Maine, boston.com reported. Eric Wiberg pointed out that the sinking occurred late in the war when submarine threats off the U.S. coast had diminished, and people had let their guard down.
The submarine responsible, U-1230, had landed two Nazi spies—Erich Gimpel and William Colepaugh—near Hancock, Maine, just four days prior to the attack. The agents were later arrested and convicted by a military court.
Family Closure and Future Documentation
Allan said the discovery is “really for the families, to give them closure.”
While the team has yet to complete a full photographic survey of the wreck, Allan said he doubted anything could be retrieved given the ship’s depth. According to Divernet, the team hopes to deploy a remotely operated vehicle at the site in 2027 to assist with further documentation.
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