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Nota:
To make its work more widely accessible, the International Committee for Weights and Measures has decided to publish an English version of its reports. Readers should note that the official record is always that of the French text. This must be used when an authoritative reference is required or when there is doubt about the interpretation of the text.
Translations, complete or partial, of this brochure (or of its earlier editions) have been published in various languages, notably in Bulgarian, Chinese, Czech, English, German, Japanese, Korean, Portuguese, Romanian, and Spanish. The ISO and numerous countries have also published standards and guides to the use of SI units.
Remark:
Non-SI units currently accepted for use with the International System:
mille (nautique), nautical mile (1 mille/nautical mile = 1852 m)
nœud, knot (= 1 mille par heure/nautical mile per hour)
The nautical mile is a special unit employed for marine and aerial navigation to express distance. The conventional value given above was adopted by the First International Extraordinary Hydrographic Conference, Monaco, 1929, under the name “International nautical mile.” As yet there is no internationally accepted symbol. This unit was originally chosen because one nautical mile on the surface of the Earth subtends approximately one minute of angle at the center.
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