Fill in the circular error, in feet and meters, for CAT IV?

The circular error for Category IV (CAT IV) is defined as a measure of the accuracy of artillery fire. This category typically represents a larger spread of impact points than the other categories. In this case, the range for CAT IV is noted as 101-300 feet and 31-91 meters. This range indicates that the artillery may be expected to impact within these distances from the intended target.

This is important because it sets the expectations for accuracy and precision in targeting, helping artillery units manage risks and coordinate effectively, especially in situations where proximity to friendly forces or civilians is a concern. The specified measurement of 101-300 feet and 31-91 meters aligns with the operational parameters defined for CAT IV, ensuring that artillery units maintain situational awareness regarding the effectiveness of their firing solutions.

In contrast, the other ranges outlined do not fit the recognized parameters for Category IV, which typically involves a broader error margin. Understanding these classifications allows personnel to make informed decisions during operations based on the expected accuracy of their artillery systems.