What must be done upon uncoupling a train at a block or interlocking station?

Upon uncoupling a train at a block or interlocking station, it is crucial to notify the block operator. This is essential because the block operator manages the safe movement of trains through the station and must be aware of any changes in train configuration or position. They need this information to ensure that the signals and track authority are properly adjusted and that the movement of trains remains safe and efficient.

Not informing the block operator could result in miscommunication, unsafe conditions, or potential accidents, as the operator relies on real-time data to control the flow of train traffic. Hence, it is a critical operational procedure that helps maintain safety and efficiency in railway operations.