What does the signal of a clenched fist accompanied by a pumping motion indicate?

The signal of a clenched fist accompanied by a pumping motion is commonly understood in maritime contexts to indicate that someone is in trouble and needs assistance. This signal is a way for a person to communicate distress or the need for help, particularly when vocal communication might not be possible or effective. By using a clear physical gesture, the individual is able to convey their situation to nearby personnel or vessels, which can lead to a timely response for rescue or assistance.

In maritime operations and during emergencies, recognizing such signals is crucial for ensuring safety and providing the necessary help. Understanding this signal allows crew members and rescuers to act swiftly and appropriately in response to emergencies at sea.