What is required before hand-operating a dual control switch?

Before hand-operating a dual control switch, it is essential to obtain permission from the Dispatcher. This requirement ensures that the operation of the switch is coordinated with the overall train movement and traffic control in the area. The Dispatcher has the responsibility to manage the flow of trains on the tracks and can provide vital information about the current status and position of trains in the vicinity.

Obtaining permission also helps to prevent accidents and ensures that the switch operation does not interfere with other ongoing operations. It establishes communication between the train crew and the Dispatching center, confirming that the crew is authorized to perform the action safely.

The other options, while they may involve safety measures or protocols in different contexts, do not directly pertain to the necessary step of securing permission for the switch operation.