Ключевые слова: aircraft, airplane, airport, alarm, alert, aviation, blue, building, city, danger, directional, equipment, fire, high, illuminated, keeper, lamp, landmark, landscape, light, nature, navigation, port, protection, red, rescue, roof, safety, security, shore, sign, signal, siren, sky, storm, symmetrical, tall, technology, top, tower, traffic, view, warning, white,