Which of the following terms describes "clear or no significant clouds"?

The term that describes "clear or no significant clouds" is represented by the abbreviation SKC, which stands for "sky clear." This designation is used in aviation weather reports to indicate that there are no significant clouds present in the sky, providing pilots with an understanding of a clear atmospheric condition. The use of SKC is particularly important for flight operations, as it suggests favorable flying conditions without the complications that cloud cover may introduce.

In contrast, the other terms indicate varying levels of cloud cover: OVC signifies overcast skies with continuous cloud cover, BKN indicates broken clouds with more than 5/8 of the sky covered, and SCT refers to scattered clouds, where less than 5/8 of the sky is covered by clouds. Each of these terms reflects the presence of clouds to a degree, which differentiates them from SKC. Understanding these abbreviations is crucial for pilots and those involved in aviation as it helps assess weather conditions effectively.