What is indicated when you use the words "PAN-PAN" in a radio message?

Using the term "PAN-PAN" in a radio message indicates an urgent situation that requires priority on the radio frequency, signifying that assistance is needed in a timely manner, but not as immediate or critical as a distress call. This phrase alerts other pilots and air traffic control that the calling party is in a situation that may require help, but the situation is not life-threatening.

This distinction is important in aviation communication because it helps prioritize actions on the frequency. While "MAYDAY" is used for emergencies that need immediate attention, "PAN-PAN" clearly communicates urgency without indicating direct danger to life or immediate risk. Thus, understanding these differences is vital for effective communication and ensuring safety in flight operations.