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A bordered square holding ground signals.
Also known as: Ground signal square, Aerodrome signal area
The marked area of an aerodrome within which ground signals are displayed to aircraft in flight.
Marks the area of an aerodrome in which ground signals are displayed to aircraft in flight.
Contexts: Public information
Communicates without radio, so it remains the fallback at an aerodrome with no radio service or to an aircraft that has lost its own.
Contexts: Public information
A square patch of ground marked out with a border, inside which panels and shapes are laid flat to be read from the air.