Which locomotives should have independent brakes cut-in?

The correct answer indicates that independent brakes should be cut-in on all mentioned options. This is critical for ensuring safe operations across various locomotive configurations.

For a single unit, having independent brakes is essential for controlling the locomotive during operations, especially when starting, stopping, or when in emergency situations.

In the case of a locomotive hauled Dead In Tow (DIT), it's equally important to engage independent brakes to ensure the safe handling of the whole train, since even if the locomotive is not operational, it needs to have braking capabilities on its own.

For the controlling locomotive in a consist, independent brakes must be used to enhance the control of the entire train. When multiple locomotives are working together, engaging the independent brakes helps manage speed and braking dynamics, ensuring that the entire unit operates safely and efficiently.

Understanding the requirement for independent brake cut-in across these scenarios reinforces the importance of safety measures in handling locomotives, whether they are operating alone or in conjunction with other units.