Categories of Message

Question 1

Message category (ordered by priority)

Answer 1

1. Distress calls, distress messages and distress traffic
2. Urgency messages, including messages preceded by the medical transports signal
3. Direction finding
4. Flight safety messages
5. Flight regulatory messages

Question 2

Distress message

Answer 2

a condition of being threatened by serious and/or immediate danger requiring immediate assistance

Question 3

Urgency messages

Answer 3

a condition concerning safety of an aircraft,
another vehicle, or some person on board or within sight that does not require immediate assistance

Question 4

Direction finding

Answer 4

Communications relating to DIRECTION FINDING

Heading
Bearing
Radial
Track vs Course

Question 5

Flight safety messages

Answer 5

movement and control messages

messages originated by an aircraft operating agency or by an aircraft, of immediate concern to an aircraft in flight

meteorological advice of immediate concern to an aircraft in flight or about to depart (individually communicated or for
broadcast)

other messages concerning aircraft in flight or about to depart

Question 6

Flight Regularity Messages

Answer 6

messages regarding the operation or maintenance of facilities essential for the safety or regularity of aircraft operation

messages concerning the servicing of aircraft

instructions to aircraft operating agency representatives concerning changes in requirements for passengers and crew
caused by unavoidable deviations from normal operating schedules