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National Airspace System
abbr. NAS
avia. национальная система воздушного пространства США (masay)
avia., amer. The common network of U.S. airspace; air navigation facilities, equipment and services, airports or landing areas; aeronautical charts, information and services; rules, regulations and procedures, technical information, and manpower and material. Included are system components shared jointly with the military.
National: 31 phrases in 14 subjects
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