Which phrase correctly conveys a SEELONCE MAYDAY transmission?

• A. "SEELONCE MAYDAY, this is (unit name), silence on this frequency out."
• B. "SEELONCE MAYDAY, this is (unit name), proceed with traffic."
• C. "SEELONCE MAYDAY, this is (unit name), return to base."
• D. "SEELONCE MAYDAY, this is (unit name), all clear."

Answer: (A)

During a distress transmission, the priority is to declare grave danger, identify who is in trouble, and clear the channel so responders can hear the emergency. The phrase that includes the Mayday call, identifies the unit, and specifically requests silence on the frequency to prevent others from transmitting and interfering is the best fit. It also ends with “out,” signaling that this is a final, standalone Mayday transmission on this channel. This combination is what you want in an emergency: alert the fleet, ensure the channel is quiet for the important message, and then close the transmission cleanly.

The other options would either keep the channel open for normal traffic or imply a different status (returning to base or all clear) that isn’t appropriate when you’re in distress.