Scale: Coordinate scale protractors is widely used by navigators to the map being measure, for 1:25,000, 1:50,000, 1:100,000, 1:250,000 map Easy to read: map scale is easy to read Compatibility: Scale map is suitable for USNG, or other base coordinate systems Wide ranges of application: suitable for land, sea navigation or other adventure activity Clear coordinate scale is make of wear resistant, long service life, Manufacturer: Yhplxyuus