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"Whiteout" occurs:
  • A
    When taking-off from a snow-covered lake.
  • B
    When flying in heavy snow.
  • C
    In flight conditions when you suddenly enter a cloud and everything "gets white" outside the cockpit windows.
  • D
    When the terrain is covered with snow and the horizon blends with the sky, visual determination of height becomes difficult.

WHITEOUT

"An atmospheric optical phenomenon of the polar regions in which the observer appears to be engulfed in a uniformly white glow. Neither shadows, horizon nor clouds are discernible; sense of depth and orientation is lost; only very dark, nearby objects can be seen. Whiteout occurs over an unbroken snow cover and beneath a uniformly overcast sky when, with the aid of the snowblink effect, the light from the sky is about equal to that from the snow surface."

  • More simply put, the phenomenon occurs when you are in the presence of a large flat area and the overcast sky blends in with the ground. You get the impression of being inside a bowl of milk or a ping-pong ball. It is impossible to make out the horizon and distance from the ground.

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