The Nautic Way Maritime Bookstore offers an exceptional choice of navigation rules.
Are you looking for a navigation rule?
The navigation ruler will be essential for you to plot your route, plot your position on a nautical chart, and determine the course to follow.
There are different kinds of rulers, which manufacturers have evolved over the years to improve accuracy and reading reliability.
the Cras ruler: developed by the French admiral Jean Cras, this transparent double protractor has become popular with a large number of sailors. The traditional black-engraved model is now complemented by an easier-to-read two-tone version. The Cras "Evolution" rule is specially dedicated to the preparation and the passage of the deep-sea license. With a length of 385mm, it is also available in several sizes, ranging from the 210mm pocket model to the 730mm merchant marine ruler.
The Breton protractor: popularized by Yvonnick Guéret in the 1960s, this protractor has in its center a mobile squared disc on which the four cardinal points are marked. It turns out to be very practical when used. The TOPO nautical protractor is part of this family of revolving window rulers that are more intuitive to use than the traditional Cras ruler.