What correction corresponds to an angular deviation of 125 mils?

An angular deviation of 125 mils calls for a specific correction based on the established methods of visual estimation for artillery adjustments. The standard conversions usually refer to physical references such as fingers to give a quick, relatable way to adjust fire.

In this context, four fingers is recognized as a standard visual representation for making adjustments in fire corrections. Each 'finger' typically represents approximately 30 mils when held up in a certain manner, and when four fingers are held out, this approximation allows for a visual cue that can guide the artillery observer in making the needed adjustment. Therefore, four fingers roughly equate to a correction of 120 mils, which is close enough to the 125 mils needed in the question, allowing for a quick decision during a time-sensitive situation.

This method of estimation is essential in the field, as it allows for rapid adjustments without the need for complicated calculations, which can be crucial in combat scenarios. The other options do not provide the correct visual representation for the specified angular deviation.