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cavu

acr. (context aviation English) ceiling And visibility unrestricted (colloquial variants include ''clear And Visibility Unrestricted'' and ''Clear above Visibility Unrestricted''), indicating a ceiling of at least 10,000 feet and visibility of at least 10 miles; ideal flying conditions.

Wikipedia
Cavu

The Cavu or rivière de Cavu, (also called rivière de Cavo, ruisseau de Sainte-Lucie, ruisseau de Finicione) is a short river in the Corse-du-Sud department of Corsica which discharges into the Tyrrhenian Sea, and the Mediterranean Sea. In 2014 the Cavu became the first place of re-emerging schistosomiasis in Europe. 120 people have become infected after bathing in it.