Multiple choice

CAVOK will be used if there are no clouds below _____m.

  1. 1000

  2. 1500

  3. 4000

  4. 6000

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

CAVOK (Ceiling and Visibility OK) can only be reported when there are no clouds below 1500 meters (approximately 5000 feet) or below the lowest minimum sector altitude, whichever is higher. This ceiling requirement ensures no obstruction to vision exists. Option B (1500m) is the correct threshold.