What occurs when a train stops due to an emergency brake application?

When a train stops due to an emergency brake application, the indication of stationing marker number disappearing from the Train On Device (TOD) is indicative of the system's response to halt the train's progress. This occurs as the emergency braking system is designed to immediately bring the train to a stop, and in doing so, the TOD may lose track of its current position, leading to the absence of the stationing marker number.

This situation signifies a critical moment where the train's operational metrics are affected by the abrupt stop, resulting in the system's inability to provide continuous location tracking. It focuses on passenger safety and ensures that the proper protocols are followed to address the emergency effectively. Such monitoring systems typically rely on the steady flow of information to maintain accurate position awareness, which is interrupted in the event of an emergency brake application.