This aviation plotter is a double-sided printed design, easy to read the scale on each side. The sectional scale 1:500000, wac scale 1:1000000 and terminal area scale 1:250000._x005f_x000D_ This flight plotter is fine in workmanship, using special manufacturing technology to make the printed numbers and other marks on the ruler will not fade for a long time._x005f_x000D_ The navigation plotter is calibrated according to the legal ratio of miles and nautical miles, ensuring that the scale is accurate and precise. This aviation ruler allows pilots to accurately determine their flight distance and direction._x005f_x000D_ This fixed plotting ruler is Perfect for aviation student training, private pilot training, search and rescue operations, and crew member training. Suitable for flight instructors use as a teaching tool to teach students how to plot routes and measure distances._x005f_x000D_ The slide rule is made of durable plastic material, not easy to break and melt. It can withstand high temperature._x005f_x000D_ _x005f_x000D_ Material:plastic_x005f_x000D_ colour:As shown_x005f_x000D_ _x005f_x000D_ Package Contents:_x005f_x000D_ 1 x flight plotter_x005f_x000D_ _x005f_x000D_ Only the above package content, other products are not included._x005f_x000D_ Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_