What is the name of the wind measuring device?
An anemometer is a device used for measuring the speed of wind, and is also a common weather station instrument. The term is derived from the Greek word anemos, which means wind, and is used to describe any wind speed measurement instrument used in meteorology.
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Historically, the nautical mile was defined as ...
one minute of latitude
one hour cruise on average wind
1/12 distance from Calais to London
1000 English yards
When did the USA introduce the metric system as preferred for weights and measures?
The knot is a unit of speed equal to...
one nautical mile per hour
5 miles per hour
3.6 kilometres per hour
1852 metres per second