When is the phrase "SEELONCE MAYDAY" typically used?

The phrase "SEELONCE MAYDAY" is used to impose silence on all stations during a distress situation at sea. When this phrase is broadcast, it indicates that a vessel is in a life-threatening situation and requires immediate attention. The use of this phrase serves to clear the radio frequency of all non-distress communications, allowing the vessel in distress to communicate effectively and without interruption.

This is essential in emergencies where critical and urgent communications must take place, as any unnecessary chatter could delay assistance and complicate the rescue operation. By invoking "SEELONCE MAYDAY," operators prioritize the safety of individuals in distress, ensuring that responses to the distress signal are not hindered by other radio traffic.

In contrast, while other options reference important communication protocols, they do not specifically pertain to the unique application of "SEELONCE MAYDAY" in demanding silence for urgent distress situations.