It is very important for the military to be well oriented in the terrain. In this case, a compass will come in handy, which, together with a map, will help to orient oneself in space. The compass works on the principle of interaction of built-in permanent magnets and the magnetic plane of the Earth. Its arrows point to the South and to the North in any circumstances.
This model is a classic cartographic compass with a mirror. The transparent case allows you to read information directly on the map. For the convenience of working with maps, parallel lines are drawn on the compass case.