This tool is equivalent to the Graphic Training Aid 5-2-12 and Protractor used by United States and NATO military forces around the world. The scale has three die cut triangles for access to mark the map being measured. The inner protractor is marked in degrees and the outer protractor is in mils.
A tutorial on using this type of tool is available here.
- 1:25,000 x 1km
- 1:50,000 x 1km
- 1:100,000 x 1km
- 1:250,000 x 10km†
† This scale can be used by multiplying or dividing one of the scales printed on the tool by 10.