What phrase should be used to interrupt lower priority messages for a higher priority message?

The phrase "Emergency, break for control" is the standard phrase used in air traffic control communications to signal a higher priority message that must be communicated immediately. This phrase indicates urgency and conveys to other pilots or controllers that the information being transmitted is critical and requires immediate attention.

Using this specific wording ensures clarity and maintains the structured communication protocol that is essential in air traffic control. The term "break" suggests an interruption of the ongoing communications, making it clear that the current transmission should cease to allow for the urgent message to be communicated.

Other options do not possess the same recognized urgency or clarity needed for emergency situations. Some may not be standard phrases within ATC communications. The usage of a standardized phrase is crucial for maintaining order and safety in potentially high-stress situations.