CAVOK A term used to indicate no cloud below 5,000 feet, visibility 6 miles or more, and no precipitation, thunderstorm activity, fog, or drifting snow. Discover more from Canadian Flight Trainers Subscribe to get the latest posts sent to your email. Type your email… Subscribe Related Articles: Abbreviations and Acronyms in AviationNavigating the IATRA Exam: A Key Step for Aspiring Commercial Pilots in Canada