If target length, or length and width are given, what must the observer also provide?

When a forward observer is given the target's length or both length and width, it is crucial for them to also provide the target's attitude. Attitude refers to the orientation or alignment of the target in three-dimensional space, particularly in how it relates to the line of sight from the observer's position. This is essential for accurate targeting and successful engagement, as it helps to understand how the target is positioned relative to the observer and the intended attack direction. Without this information, it would be difficult to adjust fire effectively, especially for indirect fire support where angles and alignment significantly impact the outcome.

Providing depth, radius, or altitude on their own does not address the necessary detail regarding the target's orientation, which is vital for properly directing fire.