B-24 Liberator aircraft crashed near Gibraltar in 1943. By this time, he had gained the nickname "Buster", after the American actor and swimmer Buster Crabbe. After the war, Crabb was stationed in Palestine and led an underwater explosives disposal team that removed mines placed by Jewish divers from the Palyam, the maritime force of the Palmach elite Jewish fighting force during the years of Mandatory Palestine. After 1947, he was demobilised from the military. Civilian diver Crabb moved to a civilian job and used his diving skills to explore the wreck of a Spanish galleon from the 1588 Armada, off Tobermory on the Isle of Mull. He then located a suitable site for a discharge pipe for the Atomic Weapons Research Establishment at Aldermaston. He later returned to work for the Royal Navy. He twice dived to investigate sunken Royal Navy submarines — in January 1950 and in 1951 — to find out whether there were any survivors. Both efforts proved fruitless. In 1952, Crabb married Margaret Elaine Player, the daughter of Henry Charles Brackenbury Williamson and the former wife of Ernest Albert Player. The couple separated in 1953 and divorced about two years later. In 1955, Crabb took frogman Sydney Knowles with him to investigate the hull of a Soviet Sverdlov-class cruiser to evaluate its superior manoeuvrability. According to Knowles, they found a circular opening at the ship's bow and inside it a large propeller that could be directed to give thrust to the bow. That same year, in March, Crabb was made to retire due to his age, but a year later he was recruited by MI6. By that time, Crabb's heavy drinking and smoking had taken its toll on his health, and he was not the diver that he had been in World War II. Crabb Affair Disappearance MI6 recruited Crabb in 1956 to investigate the Soviet cruiser Ordzhonikidze that had taken head of state Nikita Khrushchev and Nikolai Bulganin on a diplomatic mission to Britain. According to Peter Wright in his book Spycatcher (1987), Crabb was sent to investigate Ordzhonikidzes propeller, a new design that Naval Intelligence wanted to examine. On 19 April 1956, Crabb dived into Portsmouth Harbour and his MI6 controller never saw him again. Years later, a Russian who had been on board Ordzhonikidze claimed that the Soviets were expecting him that night (after being tipped off about the British operation by a