Navigation Nautical Square Ruler
1.Ideal navigation tool for student pilots, private pilots, or even professional pilots or instructors
2.Specially designed for use with maps to 1 / 500 000th

3.helps to prepare the flight,ground&effectively manage the traps

4.Dimensions,140MM² ,thickness 1.0mm,flexible and resist of break

5.To measure a distance in Nautical Miles or directly convert a distance flight time,depending on ground speed of his plane.
6.It has four sides and four colours logo printing

7.three most common speeds are represented with a color code:
  Red: 85.7kt-Fb = 0.7,  Yellow: 100kt-Fb = 0.6, Blue: 120kt-Fb = 0.5.
8.To simplify measurement&use,the center of the protractor is squared.

9.Transponder codes, forms at center helps as reminders

 10.Hard square set in 3.0mm is also available

11.Individual PVC bag package

12.An extra 60cm string and instruction paper included

13.Packing,400pcs/carton,Gross Weight,9.8KG,MEAS:53*23*21CM

14.Catering customer's OEM requirement!