What additional information must be included when identifying a mobile radio unit on a scheduled train?

When identifying a mobile radio unit on a scheduled train, including the schedule number is crucial. The schedule number serves as a unique identifier for the specific train operation at that time. It allows railway control and other crew members to pinpoint the train within the larger network of scheduled operations. This identification is essential for maintaining communication, ensuring safety, and coordinating train movements effectively.

In contrast, while other types of information like a crew member's name or weather conditions could be relevant in certain contexts, they do not specifically aid in the identification of the mobile radio unit itself. Likewise, outstanding issues may be important for operational safety, but they do not contribute to the identification process of that specific scheduled train's mobile radio unit. The clarity provided by the schedule number is fundamental for an organized and efficient communication system within railway operations.