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CAVOK abbr.
abbr., avia.	ceiling and visibility OK; visibility, cloud and present weather better than prescribed values or conditions (видимість, хмарність та поточні погодні умови кращі, ніж зазначені величини та умови gov.ua bojana)
abbr., mil., avia.	ceiling and visibility okay
abbr., product.	cloud and visibility OK (Yeldar Azanbayev)
avia., Canada	A term pronounced "KAV-OH-KAY", derived from the words "ceiling and visibility OK," that may be used in air-ground communication when meteorological information is being transmitted to aircraft. CAVOK refers to the simultaneous occurrence, at an airport, of the following meteorological conditions: a no cloud below 5000 ft, or below the highest minimum sector altitude MSA, whichever is higher, and no cumulonimbus; b a visibility of 6 SM or more; and c no precipitation, thunderstorm, shallow fog or drifting snow.