After an uncoupled portion remains on the main line, what is the immediate next step?

• A. Proceed with the main portion at reduced speed
• B. Inform the dispatcher to arrange recovery
• C. Stop, secure the uncoupled portion, protect the location, and inform the dispatcher to arrange recovery
• D. Detach the uncoupled portion and leave it on the main line

Answer: (C)

When a portion becomes uncoupled and stays on the main line, the immediate action is to stop, secure the uncoupled portion, protect the location, and inform the dispatcher to arrange recovery. This sequence is about safety first: stopping prevents any unintended movement that could collide with or derail the main train, securing the uncoupled piece (for example by applying its hand brakes and preventing any roll), and protecting the location so others are aware of the hazard and the scene is preserved for recovery operations. Notifying the dispatcher then coordinates the proper recovery work, ensuring the track can be cleared safely and efficiently. Moving on with the main train at reduced speed ignores the risk posed by an unsecured piece on the same track, and detaching and leaving the uncoupled portion on the main line creates a direct hazard and is not an approved action. Merely calling for recovery without first securing and protecting leaves a moving danger and can complicate and delay safe clearance.