CYA Square Protractor with white border

Lexan resin plastic will never warp, melt or break in high temperature environment!
5” square size protractor with under-printed white border for greater definition of headings 0-360 scale, a perfect easy-to-use tool for flying school students.
Showing NW, NE, SE, SW on each corner, 1:500,000 nautical miles scale includes square grids for quick and easy measuring.