- air navigation facility
- Any facility used, available for use, or designed for use as an aid to air navigation, including landing areas; lights; any apparatus or equipment for disseminating weather information, signaling, radio–direction finding, or radio or other electronic communications; and any other structure or mechanism having a similar purpose for guiding and controlling flights in the air, landing, or taking off. The availability of air navigational facilities is indicated by a shadow box on aeronautical charts as shown in the illustration. Also called NAVAID or navaid.Shadow box provides frequency and identification information for Carlton. The VOR frequency is 117.0 Mhz, identification car, followed by its aural morse code signal. D indicates availability of DME.Brevet adorned by an observer. Similar brevets were adorned by observers of most armed forces.
Aviation dictionary. 2014.
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