能见度 (VIS: Visibility)
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定义
The greatest distance at which prominent objects can be identified with the unaided eye
相关术语
云底高 (Ceiling)
The height of the lowest layer of clouds covering more than half the sky
决断高度 (DH: Decision Height)
The altitude during a precision approach at which the pilot must decide to land or go around
雾 (Fog)
Visibility-reducing water droplets suspended near the surface, a major cause of airport delays
METAR (METAR)
Aviation Routine Weather Report — a standardized format for reporting current weather conditions
法定英里 (SM: Statute Mile)
A unit of distance equal to 5,280 feet or approximately 1.609 km