On 4 May 1945 aircraft from the escort carriers "Searcher", , and , taking part in Operation Judgement, sank the in Kilbotn harbour in the Arctic near Harstad, Norway. Grumman TBF Avenger torpedo bombers escorted by Grumman F4F Wildcat fighters attacked the U-boat crew barracks ship MS "Black Watch", the submarine tender MS "Senja" and the floating flak battery "Thetis" (the former Norwegian coastal defence ship ). "U-711" was alongside "Black Watch" when she was sunk in position by bombs aimed at "Black Watch". "Black Watch" and "Senja" were also sunk. This was the last sinking of a U-Boat by the Fleet Air Arm, and the final air-raid of the war in Europe.