 This meant that the RAAF had to provide timber for the fixed towers, instead of the collapsible and transportable ones used in the TRU.The result was long delays in the erection of some ACO stations.Of the nine Australian ACO stations, four were erected in Queensland at RAAF 209 Radar Station at Benowa (since demolished), RAAF 210 Radar Station at Toorbul Point, RAAF 211 Radar Station at Inkermann (Charlie's Hill Radar Station), and RAAF 220 Radar Station at Bones Knob near Tolga.