 Ranges in excess of were recorded on high flying aircraft and ACOs fulfilled the secondary role of assisting navigation of Allied aircraft.Operation of 220 Radar Station RAAF 220 Radar Station was formed at Camden, New South Wales, on 7 July 1943.The unit moved to Mascot for further training on 13 August 1943 and arrived at Tolga on 23 September, moving to Bones Knob the following day.