The wreckage of a Canadian merchant vessel torpedoed by a German submarine in 1944 has been discovered nearly 400 feet below the ocean surface off the Maine coast, bringing closure to a World War II tragedy that claimed 43 lives and exposed a Nazi espionage operation on American soil.
Discovery Ends Eight-Decade Mystery
The Nomad Exploration Team, based in New Hampshire, announced this week they located the SS Cornwallis in July after years of searching. The team used side scan sonar to find the massive 400-foot steamship, then conducted follow-up dives to confirm its identity. Cold water, strong currents, and the remote location complicated the search efforts. The vessel rests as an underwater time capsule from one of World War II’s most unusual coastal episodes.
Dive team member Danny Allan said the discovery represents the culmination of years of persistence for searchers. For families and communities connected to the ship, the find brings renewed attention to a largely forgotten tragedy that occurred just miles from the American coastline during the final year of the war.
The Spy Connection
The German submarine U-1230, commanded by Hans Hilbig, had dropped off two Nazi agents near Hancock, Maine, on November 29, 1944. Erich Gimpel and William Colepaugh were tasked with gathering intelligence inside the United States at the height of the war. Colepaugh was an American who had traveled to Germany earlier that year for espionage training. The pair made it undetected from Maine to New York City before their mission collapsed.
Just four days after landing the spies, the same U-boat spotted the Cornwallis traveling along the Maine coast on December 3. The submarine fired a torpedo that struck near the ship’s bow. The vessel, loaded with sugar and molasses from Barbados and bound for St. John, New Brunswick, sank in less than 10 minutes. Only six of the 48 people aboard reached life rafts, and one died from hypothermia before rescue.
Justice Served on American Soil
The FBI launched an investigation after residents reported seeing strangers in Hancock around the time of the sinking. Colepaugh eventually confessed to a friend who contacted federal authorities. Both spies were arrested in New York City and sentenced to death by military court. Their sentences were later commuted to life in prison, demonstrating American justice even toward wartime enemies. The U-1230 survived until 1945 when it was scuttled as the war ended.