Which of the following statements is true regarding mortar round positions?

The statement about 60mm WP rounds needing to be stored nose end up is accurate because it ensures the safety and integrity of the round. Storing these rounds in this position protects the sensitive components, particularly the fuse, from damage which could occur if they were stored in any other orientation. This method of storage also helps prevent accidental activation and maintains the reliability of the rounds for when they are needed in training or combat scenarios.

The other options do not adhere to the established storage protocols for mortar rounds, making them less suitable or incorrect. The primary focus in proper storage is to safeguard the round's functionality and safety, which the statement regarding the 60mm WP rounds successfully achieves.