Okta to traditional approaches, satellite images do not account for cloud composition. Oktas are often referenced in aviation weather forecasts and low level forecasts: SKC = Sky clear (0 oktas); FEW = Few (1 to 2 oktas); SCT = Scattered (3 to 4 oktas); BKN = Broken (5 to 7 oktas); OVC = Overcast (8 oktas); NSC = nil significant cloud; CAVOK = ceiling and visibility okay. Okta In meteorology, an okta is a unit of measurement used to describe the amount of cloud cover at any given location such as a weather station. Sky conditions are estimated in terms of
Vietnamese units of measurement a foreign currency, such as "xu" for the American cent. Vietnamese units of measurement Vietnamese units of measurement () are the largely decimal units of measurement traditionally used in Vietnam until metrication. The base unit of length is the "thước" (chữ Nôm: 𡱩; lit. "ruler") or "xích" (). Some of the traditional unit names have been repurposed for metric units, such as "thước" for the metre, while other traditional names remain in translations of imperial units, such as "dặm Anh" for the English mile. Originally, many "thước" of varying lengths were in use in Vietnam, each used for different purposes.