Regulate Cras
See also: Cras
The rule Cras is a rule - Rapporteur used to trace roads and raisings on a chart of Navigation (maritime or air).
This rule, primarily used in France, proves of a practical and fast employment. It is used in different the school S from Navigation.
It holds its name of sound Inventeur the Rear-admiral Jean Cras (1879 - 1932) which, in addition to its qualities of navigator, was a Musicien, Auteur and Compositeur, of a certain notoriety.
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