Attitude is sent to the nearest how many mils?

The correct choice pertains to how attitude is rounded in artillery calculations. Attitude, which refers to the measurement of the direction of a projectile, is typically sent to the nearest 100 mils. This level of precision balances the need for accuracy with the operational efficiency of communication and processing within artillery units.

Sending attitudes to the nearest 100 mils allows for simpler calculations and adjustments in the field, reducing the likelihood of errors that could arise from overly precise figures in dynamic combat situations. This form of rounding helps maintain effectiveness while still ensuring the necessary level of accuracy in firing solutions.

In contrast, smaller increments such as 1 mil, 10 mils, or 20 mils could lead to unnecessary complications in communication and execution, which is not practical in most field operations where quick decision-making is essential. Thus, the rounding to 100 mils strikes an optimal balance for tactical effectiveness in the deployment of artillery units.