Cartes-fiches 84 Cartes-fiches
Utilisateurs 12 Utilisateurs
Langue English
Niveau École primaire
Crée / Actualisé 11.07.2012 / 10.11.2020
Attribution de licence Pas de droit d'auteur (CC0)
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What should a pilot do to keep his night vision (scotopic vision)?

Avoid food containing high amounts of vitamin A

Not smoke before start and during flight and avoid flash-blindness

Wait at least 60 minutes to night-adapt before he takes off

Select meals with high contents of vitamin B and C

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Why should a pilot turn his attention to the instruments when approaching on a snowed up, foggy or cloudy winterday? Because

perception of distance and speed is difficult in an environment of low contrast

his attention will be distracted automatically under these conditions

the danger of a "greying out" will make it impossible to determine the height above the terrain

pressure differences can cause the altimeter to give wrong information

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Illuminated anti-collision lights in IMC

will effect the pilots binocular vision

can cause colour-illusions

will improve the pilots depth perception

can cause disorientation

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A shining light is fading out (i. e. when flying into fog, dust or haze). What kind of sensation could the pilot get?

The light source will make the pilot believe, that he is climbing

The source of light stands still

The source of light is approaching him with increasing speed

The source of light moves away from him

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To prevent the "autokinetic phenomena", the following can be done:

look sideways to the source of light for better fixation

fixate the source of light, first with one eye, then with the other

look out for additional references inside and/or outside the cockpit using peripheral vision also

turn down cabin light and shake head simultaneously

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Autokinesis is

the automatical adjustment of the crystalline lens to objects situated at different distances

the phenomenon of spinning lights after the abuse of alcohol

the change in diameter of the pupil, when looking in the dark

the apparent movement of a static single light when stared at for a relatively long period of time in the dark

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A pilot is used to land on small and narrow runways only. Approaching a larger and wider runway can lead to :

a flatter than normal approach with the risk of "ducking under"

a steeper than normal approach dropping low

an early or high "round out"

the risk to land short of the overrun

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The impression of an apparent movement of light when stared at for a relatively long period of time in the dark is called

"oculografic illusion"

"white out"

"oculogyral illusion"