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 Clear coordinate scale is make of, wear resistant, long service life Wide ranges of application: suitable for land, sea navigation or other adventure activity Compatibility: Scale map is suitable for USNG, or other base coordinate systems Easy to read: map scale is easy to read, Manufacturer: XIAOQENAN