 131 Radar Station also used uniquely advanced technology because the operators were able to estimate, in addition to direction and range, the size and height of the aircraft by assessing the strength of the signals received.Originally this mobile GCI unit, made up of British Mark V equipment, was housed on the back of 4x4 Crossley trucks, camouflaged underneath netted canopies.In August 1942, 131 Radar Station was moved to Beverley Park at Kogarah and then on to Kyeemagh where a series of test flights were logged to assess the performance of the equipment and the skills of the operating staff.