How do you interrupt a lower priority message?

To interrupt a lower priority message effectively, using the words "EMERGENCY" or "CONTROL" is the correct approach. This method is recognized in aviation communication as a standard practice to indicate an urgent need for attention. By using these specific terms, you clearly convey the necessity to interrupt the current transmission, making it understood that the information you need to deliver is time-sensitive and of higher priority.

This approach contrasts with simply relaying the message anyway, which could lead to confusion and potential safety risks. Similarly, waiting for the lower-priority message to finish can delay critical communication, possibly affecting safety or operational efficiency. Asking for permission to interrupt may not always be practical or timely, especially in emergency scenarios where immediate action is required. By stating "EMERGENCY" or "CONTROL," you establish an immediate need for focus and ensure that your message is prioritized without further delay.