What is the primary function of the M2 Compass reading technique?

The primary function of the M2 Compass reading technique is to determine the north direction. This technique is essential for navigation and orientation in various terrain situations. By establishing north, soldiers can effectively orient maps, set up equipment, and ensure strategic positioning on the battlefield. Knowing the cardinal directions aids in accurately planning movements, coordinating with other units, and executing fire missions.

The other choices—measuring height, indicating wind direction, and calculating distances—do not pertain to the core purpose of the M2 Compass. Each of those tasks requires different tools or methods, such as altimeters for height measurement or anemometers for wind direction. Thus, the M2 Compass reading technique is specifically designed for establishing north, making it a fundamental skill for tactical maneuvering and operational effectiveness.