What is the angular deviation in mils represented by a fist?

A fist is commonly used as a reference for measuring angles in mils, especially regarding artillery and indirect fire. A typical human fist at arm's length subtends an angle of approximately 180 mils. This is a useful visual aid for estimators in the field when determining angular deviations for targeting.

The other options do not correspond to the approximate angular measurement of a fist. A deviation of 125 mils would not be an accurate representation, as it is smaller than the visual size of a fist. Similarly, 300 mils would exceed the practical angle subtended by a fist, while 90 mils would underrepresent it. Therefore, the answer of 180 mils is accurate for the angular deviation represented by a fist.