If a train passes over a dangerous defect, what must the crew do immediately?

When a train passes over a dangerous defect, the crew's immediate responsibility is to ensure the safety of the train and its passengers. Notifying a dispatcher is essential because it allows the railway management to be informed of the situation and take necessary actions, such as diverting other trains or coordinating repairs.

Providing protection, if necessary, is crucial to prevent further accidents. This involves taking measures to alert other trains of the potential danger and possibly stopping them from entering that section of track. By acting promptly, the crew helps maintain the safety of both their train and the entire rail network.

Continuing to the next station without stopping would be hazardous, as it could exacerbate the unsafe situation. Inspecting the train only after reaching the destination or simply reducing speed and proceeding carefully does not address the immediate risk posed by the defect. These actions do not ensure other trains or potential hazards are managed effectively. Therefore, the priority must always be to communicate with the dispatcher and provide any necessary protection immediately.