Sergeant John Sivyer “Siv” Turnock enlisted to the Royal Australian Air Force on 8 November 1940. He undertook his elementary flying training at Narrandera, New South Wales, and his service flying training at Calgary, Alberta, Canada. In late 1941, Sergeant Turnock did his operational training at Lichfield, Staffordshire, England. He went on to serve with 460 Squadron based in Yorkshire, England, from 2 January 1942. On 13 March 1942, Sergeant Turnock started his first operational flight, serving as second pilot of a Vickers Wellington aircraft. It was one of five aircraft destined for a raid on Ostende, Belgium. However, the aircraft crashed and exploded at St. Joris, Niewpoort, Belgium, instantly killing all crewmembers. Sergeant Turnock and his crew were buried by local people at St. Joris Communal Cemetery, Belgium.