On 5 July 1940, while on patrol off Skudesnes, south-west Norway, HMS Shark (Lt.Cdr. Peter Noel Buckley, RN) was on the surface when a seaplane was sighted astern. As the submarine submerged to avoid the aircraft two or three bombs exploded close to the stern, followed closely by at least two more. The explosions caused considerable damage. Without steering gear and the hydroplanes jammed hard to rise, the submarine’s bow broached the surface to be greeted by more bombs. The submarine began to sink by the stern and all high-pressure air was used to return her to the surface. Once on the surface Shark got underway steering on main engines. Being sighted yet again the submarine came under sustained attack and No. 4 ballast tank was holed. Finally more aircraft arrived and Shark had no option but to capitulate. At about 0400 hours the next day three German minesweeping trawlers M-1803, M1806 and M-1807 arrived to take Shark under tow but the submarine was beyond saving and she began to sink stern first about 25 nautical miles west-south-west of Egersund, Norway in position 58º18'N, 05º13'E.