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When the term "CAVOK" is used in an aviation routine weather report (METAR), what are the values of visibility and cloud?
  • A
    Visibility more than 8 km, no cloud below 3000 feet.
  • B
    Visibility 10 km or more, no cloud below 1500 feet.
  • C
    Visibility 10 km or more, no cloud below 5000 feet.
  • D
    Visibility more than 5000 m, no cloud below 1500 feet.

CAVOK: Ceilling and Visibility OK. The phrase CAVOK can replace the groups of visibility, present weather and sky condition if the appropriate conditions apply at the same time. These are:

  • Visibility 10 km or more;
  • No cloud of operational significance (no cloud base under 5000 ft or the highest MSA, whichever is greater, and no CB or TCU);
  • No weather of significance to aviation.

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