Which of the following statements about labeling a T on a terrain sketch is true?

Labeling a T on a terrain sketch is a critical aspect of effectively communicating essential information for fire support operations. The requirement to include description, direction, distance, altitude, and grid coordinates ensures that anyone reviewing the terrain sketch has a complete understanding of the target's location in relation to other relevant elements.

Including all these parameters allows for accurate targeting and facilitates coordination among various units involved in the operation. The description gives context about what the target is, the direction indicates where the target is in relation to the observer, the distance quantifies how far away it is, the altitude ensures that elevation differences are considered, and the grid coordinates provide precise location mapping.

This comprehensive labeling is crucial for effective communication and collaboration in the field, leading to successful mission execution. The other options suggest a limited or optional approach to labeling, which would hinder clarity and possibly compromise operational effectiveness.