could only be trained using two seat variants of the de Havilland Vampire (a straight-winged jet), before going solo in a Tunnan. 99 pilots were killed during military practice flights in Sweden. In May 1967, the fighter versions of the Tunnan was retired from combat service; however, a number of aircraft were retained and reconfigured for use as countermeasures trainers and for target towing duties into the 1970s. In August 1976, the last official military flight was performed at the Swedish Air Force's 50th anniversary air show. Austria On 27 January 1961, the Swedish Government authorized the Air Board to sell 15 J 29F Tunnans to Saab for restoration and resale to the Austrian Air Force. In 1962, the sale of a further 15 J 29F aircraft to Austria was authorized. This second batch was modified so a camera pod could be installed in the port side of the nose of each aircraft, which required the removal of two cannons. The interchangeable camera pod could be exchanged in roughly 30 minutes, and the cameras could be redirected in flight from the cockpit. Due to the limitations of the 1955 Austrian State Treaty, these were never armed with air-to-air missiles. The Tunnan remained in Austrian Air Force service until 1972. On 20 October 1964 at 9:48 a.m., two Austrian J 29Fs took off from the base in Linz (they belonged to the 2. Jagdbomber Staffel, the first Bu. No. 29559 "E" was piloted by Sergeant Johan Kemetinger, the second Bu. No. 29627 "L" was piloted by Staff Sergeant Alfred Erdler). In bad weather and a radio beacon mix-up, the pilots "smoked" and crossed the airspace of the then Czechoslovakia. Due to the bad weather, they could not even be intercepted by the emergency pair, who had to stay at the airport. The Austrian pilots thus got deep into the interior of the country and after finding that they had fuel for about the last 2 minutes of the flight, the pilots, believing that the field on which they landed was solid enough, landed in a field in the area of the village of Ořech in the Prague-West district. Coincidentally, just a few kilometres from the civilian Prague-Ruzyně airport. One machine lost its landing gear on landing, the other overturned on a ditch, the pilot was trapped and had to be rescued by people working in the field. Both pilots were returned