This stage saw substantial upgrades to the stage B equipment followed by the establishment of No. 1 Radar Surveillance Unit RAAF (1RSU) and the handover of the radar to 1RSU.
Pada tahap ini, perlengkapan tahap B diperbarui besar-besaran diikuti pembentukan No. 1 Radar Surveillance Unit RAAF (1RSU) dan penyerahan radar ke 1RSU.