23D3 A
 What is meant by the term "Seelonce Mayday"?
A. Stations not directly involved with the on-going Distress communications may not transmit on the Distress frequency or channel.
B. Stations remaining off the air to safeguard proprietary information.
C. Two three-minute silent periods, at 15 and 45 minutes after the hour, that provide a transmitting "window" for distressed vessels to transmit Distress alerts using J3E. 
D. Communications on a Distress frequency or channel is banned for 24 hours following the cessation of the Distress traffic.
