In the event of an improper long station stop while in MCS mode, what action should the engineer take?

In the situation of an improper long station stop while operating in MCS mode, the appropriate action for the engineer is to notify the Trainmaster. This step is crucial because the Trainmaster is responsible for overseeing operations, ensuring safety protocols are followed, and managing any necessary responses to irregular events. By informing the Trainmaster, the engineer enables coordination and support for resolving any issues that arise from the improper stop.

It is essential that engineers adhere to established procedures that prioritize communication and safety, particularly in circumstances where the standard operation could be impacted. The Trainmaster can then assess the situation, determine the next steps, and communicate needed instructions to the crew and passengers as applicable.

Other choices such as continuing the journey, signaling to passengers, or switching to MATC mode may not appropriately address the circumstances of an improper long station stop, which requires recognition of the situation and communication with operational oversight.