Horizontal Visibility

Horizontal visibility is the distance a pilot can see horizontally in a given weather condition. It is the visibility at an observer's eye level, looking out horizontally. It is measured in statute miles or meters. The horizontal visibility is an important factor in aviation as it determines the minimum visibility required for a pilot to take off, land, or continue flying. The visibility can be affected by various weather conditions such as fog, haze, smoke, precipitation, and darkness. The visibility can be reported by ground personnel or measured by instruments such as transmissometers or forward-scatter meters.
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