In 1945, the British Royal Air Force accidentally sunk a ship, that called SS Cap Arcona, full of holocaust victims.
Cap Arcona, named after Cape Arkona on the island of Rügen, was a large German ocean liner and the flagship of the Hamburg Südamerikanische Dampfschifffahrts-Gesellschaft (Hamburg-South America Line). She took her maiden voyage on 29 October 1927, carrying passengers and cargo between Germany and the east coast of South America, and in her time was the largest and quickest ship on the route.
In 1940 the Kriegsmarine requisitioned her as an accommodation ship. In 1942 she served as the set for the German propaganda feature film Titanic. In 1945 she evacuated almost 26,000 German soldiers and civilians from East Prussia before the advance of the Red Army.
Cap Arcona's final use was as a prison ship. In May 1945 she was heavily laden with prisoners from Nazi concentration camps when the Royal Air Force sank her, killing about 5,000 people; with more than 2,000 further casualties in the sinkings of the accompanying vessels of the prison fleet; Deutschland and Thielbek. Approximately 5,000 people died in the shipwreck, three times more than in the wreck of the actual Titanic.