What must be provided for a circular target during its description?

For a circular target, the radius must be provided during its description as it denotes the distance from the center of the circle to its perimeter. This essential measurement helps in defining the size of the target and is a key component for calculating its area. Knowing the radius allows for the calculation of important factors such as the effective engagement range and the necessary ordinance adjustment for targeting.

While the diameter, area, and angle can all relate to the characteristics of a circle, they are not primarily used in target description. The diameter is simply twice the radius, and the area can be derived from the radius using the formula A=πr². Angle is unrelated to a circular target's basic size description. Thus, providing the radius ensures clarity and precision in communicating the dimensions of the target for operational purposes.