Okta 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 how many eighths of the sky are covered in cloud, ranging from 0 oktas (completely clear sky) through to 8 oktas (completely overcast). In addition, in the SYNOP code there is an extra cloud cover indicator '9' indicating that the sky is totally obscured (i.e. hidden from view), usually due to dense fog or heavy snow. When used in weather charts, okta measurements are shown by
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.