Detailed features
Polaris Tricolour Ruler
The three-colour red, green and black cras ruler is very popular with boaters and boat licence applicants because it is more practical and easier to read than traditional cras rulers.
Features of the Polaris Ruler
The Polaris Tricolour Ruler is a three-coloured ruler with red, green and black colours, very popular with boaters and boat licence applicants because it is more practical and readable than the traditional rules. Our brand Flash-Tide Several years ago, he carried out research and design work (patented) on the overlapping of the two protractors, which makes the Cras Flash-Tide navigation rules a reference, particularly for nautical and maritime training and the preparation of the offshore licence.
The Cras rule Polaris Tricolour is made up of a green protractor for measuring and plotting routes and bearings from 0° to 180° and a red protractor for those from 180° to 360°. The principle of use is simple, on a meridian or a parallel, it is necessary to align the center of the protractor the most "southern" on the map with the angle of the road to be traced or measured.
The Polaris Tricolour Rule also has two distance scales: a nautical mile scale for 1:50,000 charts (such as the SHOM chart 9999 for the offshore licence) and a universal scale in centimetres.
All our Cras rulers are manufactured on a crystal clear PVC support marked with a process that makes the ruler's graduations and markings unalterable.
The product includes a instructions for use and access to online tutorials on PickseaVideo or in the footer of this site.
The Flash-Tide navigation rulers are designed and manufactured in France by Picksea.
- Dimensions: 380 x 110 mm
- Transparent PVC backing
- Red, green and black indelible tri-colour graduation
- 1 distance scale in miles at 1:50,000 and 1 scale in centimeters
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