The red and white striped hut containing the Type 276 radar, known as the Aerodrome Control Radar or ACR, which was used experimentally at Melbourne's Essendon Airport in the early 1950s was located in the south-western corner of the aerodrome near the threshold of Runway 08.

This ex-naval equipment operated on 220 V DC supplied by a power supply located in a nearby hut known as the 'navy hut'. This was an electric motor driving a generator.

In the Essendon installation, the operator was located in the upper section of the hut and the radar aerial was located upside-down underneath the floor of the hut in an attempt to minimise permanent echoes caused by ground reflections. The aerial could rotate at up to 10 rpm, however the operator could also manually control the scan to track a particular target.

The date of this photo is not known exactly, but the Type 276 radar was in service at Essendon from approximately 1950 to 1956.

The diagram below shows the internal layout of the hut. Temperatures could reach 128 degrees F in summer!