Practice question

In a METAR report from Bahrain International Airport (OBBI), what exact criteria must be fulfilled simultaneously for the term 'CAVOK' to be used?

  1. Visibility 5 km or more, cloud ceiling at or above 1,500 ft, and no rain
  2. Visibility 10 km or more; no cloud below 5,000 ft (1,500 m) or below the highest minimum sector altitude (whichever is greater); no CB or TCU clouds; and no significant weather phenomena
  3. Visibility 8 km or more, no clouds anywhere in the sky, and temperature below 30°C
  4. Clear skies and calm winds reported by both pilot and tower controller

Answer: B — Visibility 10 km or more; no cloud below 5,000 ft (1,500 m) or below the highest minimum sector altitude (whichever is greater); no CB or TCU clouds; and no significant weather phenomena

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