What is the universal transverse mecator system?
Universal Transverse Mercator system (UTMs) is a coordinate system used in place of Latitude/Longitude by military services, especially the Army and the Marines. Instead of using absolute values with respect to the entire world (which require many decimal places to be accurate within several feet) UTMs are based on a lettered grid system of the world. Within each square of this grid is a 10×10 grid. These 10×10 grids continue to decrease in size to other 10×10 grids within them, so that you can very quickly specify a specific point on the ground. UTMs are most often used for small troop movements on a battlefield, as well as artillery and mortar strike coordinates.