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A
perception of distance and speed is difficult in an environment of low contrast.
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B
“the danger of a “greying out” will make it impossible to determine the height above the terrain.
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C
his/her attention will be distracted automatically under these conditions.
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D
pressure differences can cause the altimeter to give wrong information.
Atmospheric haze, fog or snow (low contrast environment) can create an illusion of being at a greater distance and height from an object because our brain is used to estimating the distance of objects in relation to the horizon. When approaching a runway the pilot may have the illusion of being at a greater distance and height from the runway. As a result, he/she has a tendency to be low on the approach.
Conversely, extremely clear air (clear bright conditions of a high attitude airport) can give the pilot the illusion of being closer than he or she actually is, resulting in a high approach that may result in an overshoot or go around. The diffusion of light due to water particles on the windshield can adversely affect depth perception. The lights and terrain features normally used to gauge height during landing become less effective for the pilot.
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This question has appeared on the real examination, you can find the related countries below.
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Poland2
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United Kingdom1
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