ground signals


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ground signals

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A visual signal displayed on an airfield to give local air traffic rules information to flight crews in the air. These signals are displayed in a signal area 12 m2 and bounded by a white border. Such signal areas are located at aerodromes where general aviation movements are significant. The signal area, or signal square as it is more commonly known, is located so that it is easily visible from all directions of approach. The signals in the illustration can be seen in the signal area.
References in periodicals archive ?
During the war in Afghanistan, the GBS provided "instant situational awareness" to troops and pilots by integrating intelligence from satellites, unmanned aerial vehicle flights, and ground signals intelligence stations.
Note that the receiving terminal uses extended connectors for the three ground signals so that the ground reference between the device and host can be shared prior to signals being applied at the input.
However, drivers found it hard to identify ground signals being obscured by clouds, sand, rain and other natural climate conditions that prevail along many routes.