Lieutenant-Commander Lionel Kenneth Phillip Crabb, (28 January 1909 – presumed dead 19 April 1956), known as Buster Crabb, was a Royal Navy frogman and diver who vanished during a reconnaissance mission for MI6 around a Soviet cruiser berthed at Portsmouth Dockyard in 1956. Early life Lionel Crabb was born in 1909 to Hugh Alexander Crabb and Beatrice (née Goodall) of Streatham, south-west London. They were a poor family; Hugh Crabb was a commercial traveller for a firm of photographic merchants. In his youth Crabb held many jobs but after two years training for a career at sea in the school ship HMS Conway he joined the merchant navy and the Royal Naval Volunteer Reserve before the Second World War. Second World War At the outbreak of the Second World War, Crabb was first an army gunner. Then, in 1941, he joined the Royal Navy. The next year he was sent to Gibraltar where he worked in a mine and bomb disposal unit to remove the Italian limpet mines that enemy divers had attached to the hulls of Allied ships. Initially, Crabb's job was to disarm mines that British divers removed, but eventually he decided to learn to dive. He was one of a group of underwater clearance divers who checked for limpet mines in Gibraltar harbour during the period of Italian frogman and manned torpedo attacks by the Decima Flottiglia MAS. They dived with oxygen rebreathers, Davis Submerged Escape Apparatus, which until then had not been used much if at all for swimming down from the surface. At first they swam by breaststroke without swimfins. On 8 December 1942, during one such attack, two of the Italian frogmen, Lieutenant Visintini and Petty Officer Magro, died, probably killed by small explosive charges thrown from harbour-defence patrol boats, a tactic said to have been introduced by Crabb. Their bodies were recovered, and their swimfins and Scuba sets were taken and from then on used by Sydney Knowles and Crabb. Awards Crabb was awarded the George Medal for his efforts and was promoted to lieutenant commander. In 1943 he became Principal Diving Officer for Northern Italy, and was assigned to clear mines in the ports of Livorno and Venice; he was later created an Officer of the Order of the British Empire for these services. He was also an investigating diver in the suspicious death of General Sikorski of the Polish Army, whose