Found this declassified RAAF file (NAA: A9755, 8) on “Operation Close Encounter” from 1983. Good little UFO debunk story. Background: Late June 1983, Mascot Area Approach Control started reporting unidentified radar contacts moving like aircraft. RAAF Base Williamtown got tasked to investigate on 30 June. By the next morning two Mirage interceptors were on Alert 2 and 3 Control and Reporting Unit (3CRU) started round the clock radar surveillance. Contacts sat 70 to 150nm north of Sydney, spee...