What should a mariner do if they receive a message they do not understand?

When a mariner receives a message they do not understand, requesting clarification is the appropriate and safest action to take. Communication at sea is critical for safety and operational effectiveness, and it is essential to ensure that all messages are clearly understood. Misinterpretations can lead to unsafe situations or operational errors, especially when dealing with navigation, emergencies, or equipment malfunctions.

Requesting clarification not only helps to eliminate confusion but also ensures that all parties involved are on the same page, reducing the likelihood of accidents. This approach fosters effective communication, which is a cornerstone of maritime operations.

The other choices would not contribute positively to safety or clarity. Ignoring the message could result in missing important information that may affect operations or safety. Repeating the message may perpetuate misunderstandings if the original content was unclear. Ending communication immediately cuts off a potentially vital exchange that could provide necessary information or instructions.