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Restricted Operator Certificate - Aeronautical (ROC-A) (Questions with 100% correct answers)
The order of priority for transmission of messages in the aeronautical service is: correct answers 1. Distress communications. 
2. Urgency communications. 
3. Communications relating to radio direction-finding. 
4. Flight safety messages. 
5. Meteorological messages. 
6. Flight regularity messages. 
7. Messages relating to the application of the United Nations Charter. 
8. Government messages for which priority has been expressly requested. 
9. Service communications relating to the workings of ...