Sydney Approach Control Centre - Late 1950s

This September 1956 photo shows the Sydney Arrivals controller sitting at the then-new Semi-automatic Level Assignment Board (SLAB). Using a system of different coloured lights activated by the inserting or removing of a flight progress strip, the SLAB allowed the silent coordination of level assignment for arriving aircraft between Arrivals and the Tower.

(Photo: CAHS collection)

Click here to read about the Semi-automatic Level Assignment Board

Click here to see the Melbourne/Essendon AAC in the late 1950s

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