When operating a VHF marine radio, when should the term MAYDAY be used?

The term "MAYDAY" is a critical distress signal that is used exclusively in situations where life is in imminent danger. This term communicates to all listening stations that the situation is urgent and requires immediate assistance. When someone uses "MAYDAY," it indicates that there is a grave and imminent threat to safety, which may involve a sinking vessel, a person overboard, or serious injuries.

Using "MAYDAY" inappropriately—such as for mechanical issues, regular communication, or non-emergency calls—could divert attention and resources from actual emergencies, potentially endangering lives. Therefore, it is essential to reserve this term for genuine and dire situations only, ensuring that emergency responders can prioritize their actions effectively. This understanding is vital for maintaining safety and efficient communication on the water.