The "CRAS" navigation ruler is approved by the Merchant Navy, the French Navy, the Civil Aviation and the Air Force. It is made by hot engraving on top quality Plexiglas or P.V.C., which guarantees an excellent longevity.
The "Aéronavale" model is also a pocket model (220 x 90 mm).
Black engraving on P.V.C. of 1 mm.
Length : 220 mm.