Amazon.com.au:Customer reviews: GOTICAL Military UTM/MGRS Coordinate Scale Map Reading and Land Navigation Topographical Map Scale, Protractor and Grid Coordinate Reader Pairs with Compass and Pace Counter Beads by GOTICAL
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These map protractors are better than the ones I used for 24 years in the army; and those were free. Much more durable and the printing resists wear better. They may seem a bit pricey, but if you use them frequently, they are really worth every penny. Happy navigating!
I looked for a scale for a long time until I discovered this. A great find. A real flash back to my map reading days in the army. Still a tried and true way to read a paper map when all electronics fail.