5.1.8 Categories of messages
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
a) Distress calls, distress messages
and distress traffic
b) Urgency messages, including
messages preceded by the
medical transports signal
c) Communications relating to
direction finding
d) Flight safety messages
e) Meteorological messages
f) Flight regularity messages
Radiotelephony signal
MAYDAY
PAN, PAN
or PAN, PAN
MEDICAL
—
—
—
—
5.1.8.4 Flight safety messages shall comprise the
following:
1) movement and control messages [see PANS-ATM(Doc 4444)];
2) messages originated by an aircraft operating agency or by an aircraft, of immediate concern to an aircraft in
flight;
3) meteorological advice of immediate concern to an aircraft in flight or about to depart (individually communicated
or for broadcast);
4) other messages concerning aircraft in flight or about to depart.
5.1.8.5 Meteorological messages shall comprise meteorological information to or from aircraft, other than those in
5.1.8.4, 3).
(Dikutip oleh Indonesia-ICAO dari Sumber Annex 10 to the Convention on International Civil Aviation Volume II
Communication Procedures including those with PANS Status, Sixth Edition, October 2001)