Loss of separation involving a Beech Aircraft Corp 58, VH-BSE and Mcdonnell Douglas Corp. F/A-18A, VIKING 51, 57km S Darwin, Aerodrome, NT on 17 June 1996

Two foreign military F18 aircraft entered the Darwin CTA without prior warning, or an airways clearance, 57 km south of Darwin and were observed on radar climbing to 9,000 ft. A Beech Baron aircraft, in the exact same locality, had just been cleared to descend from 8,500 ft to 3,000 ft. A breakdown in separation occurred as the aircraft passed. The aircrews of the foreign aircraft were rebriefed on Australian ATC procedures and requirements.