Effects Of Low Visibility
The obvious reason low visibility is a hazard is that the pilot can not see dangers up ahead, maybe until it is too late. For example: Helicopter pilots can not see telephone wires at all under low visibility and there are many cases of accidents, some fatal, where helicopters have run into these invisible power lines and crashed their helicopters. Another serious danger is that pilots can not see other pilots.
| Fog: | As early morning temperatures increase, fog usually begins to lift, but if there is a cloud layer above, the visibility improves much slower. |
| Haze: | Haze makes contrasting colors less distinct, so objects are harder to see. It also creates the illusion of being higher than you actually are above the runway, and can cause pilots to fly a lower approach. |
| Smoke: | Smoke is a hazard only when it drifts across your intended landing field. |
| Smog: | This can produce very poor visibility over a large area. |
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