Ключевые слова: air masses, air traffic control, air traffic controller, aircraft, airfield, airplane, airport, beaufort, blue, danger, flag, flight training, fly, horizon, indication, instrument, landing, mast, much, pilot, plane, propeller, propeller plane, red, runway, safety, security, sky, sock, space, speed, start, storm, strong, terminal, thermal, tower, vane, weather, weathervane, white, wind, windbows, windscreen, windvane, with,