What does "CAVOK" stand for in aviation weather reporting?

CAVOK stands for "Ceiling and Visibility OK." This term is used in aviation weather reporting to indicate that there are no significant weather phenomena to impact aviation operations within the designated area. Specifically, it signifies that visibility is good, there are no significant clouds present, and there are no weather conditions such as fog, rain, or thunderstorms that would affect flying safety.

Choosing "Ceiling and Visibility OK" is correct because it accurately describes the conditions a pilot can expect when CAVOK is reported. It suggests that both the ceiling (the height of the lowest layer of clouds) and visibility meet safe thresholds for aviation operations, thereby providing pilots with confidence regarding the weather likely to be encountered during flight.

The other options do not accurately reflect the definition of CAVOK. While they may seem plausible in a general context, none of them encapsulate the precise nature of the information conveyed by the term used in aviation.