What should an engineer do if they encounter a Call for Orders signal?

When an engineer encounters a Call for Orders signal, the appropriate response is to stop the train on their own. This signal indicates that the engineer must be prepared to receive new orders or instructions that may affect the operation of the train. Stopping ensures that the train can come to a halt safely to await further instructions and prevents any potential safety hazards that could arise from continued movement without clear guidance.

Stopping the train allows the engineer to receive updated information, assess the situation, and determine the correct course of action according to the new orders once given. This procedure is in place to ensure the safety of both the train crew and the passengers, as well as to maintain the overall safety and efficiency of train operations.

While other options may imply different courses of action, none adhere to the necessary protocols for handling a Call for Orders signal and maintaining safety on the railway.