During the MATC mode, how often must the ATC Start button be activated?

In the MATC (Manual Automatic Train Control) mode, the activation of the ATC Start button every time the train stops is crucial for ensuring operational safety and compliance with system protocols. This requirement is in place so that the operator confirms the intention to start the train once it has come to a stop, which could happen for various reasons, such as waiting to depart from a station or holding for a signal.

By requiring the ATC Start button to be activated at each stop, the system establishes a clear protocol for initiating movement after the train has halted, allowing for more controlled management of train operations. This practice helps in preventing inadvertent acceleration or movement without the operator's intent, especially in situations where the train may be at a station or junction where passengers are disembarking or boarding.

Other options may imply a less rigorous safety check or operational protocol that does not align with the principles of maintaining a strict control over train movements in the MATC mode. For instance, activating the button just once per trip could lead to potential safety hazards by allowing the train to start moving without confirming the operator’s readiness at each stop.