Military Map Rulers CYA map rulers are designed for military plotting latitude & longtitude coordinate, it also comes with meters or kilometers to measure UTM, MGRS, and USNG coordinates. MSR-11: 24,000 Scale Map Ruler MSR-21: 62,500 Scale Map Ruler MSR-31: 100,000 Scale Map Ruler MSR-41: 126,720 Scale Map Ruler MSR-5Military Corner Ruler