On this day in 1946,the operation to scuttle 116 surrendered German U-Boats was completed in the Atlantic between Ireland & Scotland. The Royal Navy completed the task over 3 months under the moniker Operation Deadlight. A mass of surrendered German U-boats at their mooring at Lisahally, Northern Ireland. There are nine of the 21 class (1600 tons carrying 23 torpedoes), four of the 9 class (500 tons) and thirty nine of the 7 class (also 500 tons), a total of fifty two U-boats.