Oliver Gomersal was navigator with 621 Squadron stationed in East Africa and Aden. On 2 May 1944 his Wellington successfully attacked a German submarine, U852.
Service history of U852 depth-charged by Royal Air Force aircraft of 8 and 621 Squadron, driven ashore and scuttled south east of Socotra. History of Heinz-Wilhelm Ech, the captain, and records vessels sunk by the submarine.