What procedure is required if there is doubt concerning the meaning of a hand signal?

In situations where there is doubt concerning the meaning of a hand signal, it is imperative to prioritize safety above all else. Stopping the movement ensures that no unintended actions are taken while the meaning of the signal is clarified. This approach minimizes the risk of accidents or misunderstandings that could arise from misinterpreting the signal.

The correct procedure emphasizes the importance of confirming or clarifying the signal before proceeding, thereby protecting the safety of both the crew and passengers. Other procedures, such as notifying the engineer or proceeding with caution, do not provide the definitive safety halt required to ensure proper communication and understanding of the signal. Consulting the signal chart can aid in clarifying the signal but does not address the immediate need to stop movement in uncertainty. Stopping is a proactive measure that keeps everyone safe while finding clarity on the situation.