A signal square is aerodrome equipment defined internationally at annex 14 of the Convention on International Civil Aviation by the International Civil Aviation Organization. It contains ground symbols that visually indicate aerodrome conditions to over-flying aircraft.
A signal square is aerodrome equipment defined internationally at annex 14 of the Convention on International Civil Aviation by the International Civil Aviation Organization. It contains ground symbols that visually indicate aerodrome conditions to over-flying aircraft.
Source: Wikipedia "Signal square" · CC BY-SA 4.0
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