Which position is the normal ATC mode switch in Yard territory?

The normal Automatic Train Control (ATC) mode switch position in Yard territory is MCS, which stands for Movement Control System. In this position, the ATC system is programmed to facilitate safe train movements within the confines of the yard, allowing for operations such as switching, parking, and servicing trains.

In MCS mode, the system enforces specific speed restrictions and operational protocols that are tailored for yard operations, ensuring that trains can maneuver safely in the often congested and complex environment of a rail yard. This mode may enable features that help train engineers manage their speed more closely, given the proximity of personnel and equipment in the yard.

Other positions, while relevant for different operational contexts, do not provide the same level of control and safety specifically required in yard territory. For example, Bypass mode would allow trains to override certain ATC functions, which is not suitable for typical yard operations where safety and compliance with clearance and movement protocols are paramount. Similarly, Release and MATC modes correspond to different operational scenarios which could compromise safety in this specific setting.

Hence, MCS is the appropriate choice as it reflects the system's design to maintain safe and effective train operations within yard environments.