Direction plays an important role in a soldier's everyday life.
It also includes some advanced aspects of map reading, such as intersection, resection, modified resection, and polar plots. Directions are expressed as units of angular measure. The mil expresses the size of an angle formed when a circle is divided into 6,400 angles with the vertex of the angles at the center of the circle. A relationship can be established between degrees and mils. A circle equals 6400 mils divided by 360 degrees, or 17.78 mils per degree.