In what situation is short identification permitted?

Short identification is permitted when positive identification is achieved within yard operations. In these environments, effective communication is vital, and using short identification promotes efficiency without compromising safety. When the personnel involved can clearly identify each other based on existing knowledge or established protocols, it allows for streamlined operations while still ensuring that everyone understands their roles and responsibilities.

In contrast, using full identification is often emphasized in other contexts, such as when communicating during emergency situations or working outside of a yard, where clarity and assurance about the identities involved are critical to avoid any potential misunderstandings or safety risks.