How frequently should the M2 Aiming Circle be declinated?

The M2 Aiming Circle must be declinated when various conditions affect its accuracy and performance. This includes routine declination, such as once a day during operations, but also when it is suspected to be faulty, or if it has been physically dropped. Each of these situations can introduce errors in azimuth readings, affecting the overall precision of the artillery operations.

Declination aligns the instrument with true north, ensuring accurate targeting of artillery systems. Performing this procedure after any of the identified circumstances helps maintain operational integrity and safety. Regular and situational declinations are therefore critical aspects of maintaining the aiming circle's competency in field artillery operations.