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Which category of message has priority over urgency messages?
  • A
    Flight safety
  • B
    Distress
  • C
    Direction-finding
  • D
    Meteorological

CATEGORIES OF MESSAGES
The messages transmitted by either the aircraft or the aeronautical stations can be classified into categories. These categories are defined by ICAO Annex 10, Volume II.

The categories of messages handled by the aeronautical mobile service and the order of priority in the establishment of communications and the transmission of messages shall be in accordance with the following table (Message category and order of priority):

1) DISTRESS calls, distress messages and distress traffic
2) URGENCY messages, including messages preceded by the medical transports signal
3) Communications relating to DIRECTION FINDING
4) FLIGHT SAFETY messages
5) METEOROLOGICAL messages
6) FLIGHT REGULARITY messages

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