CAP 413 Radiotelephony Manual
Chapter 2 Page 22
1.23 Record of Communications
All ATC units have automatic equipment to record air-ground communications and
some other ATS units (e.g. AFIS) also have such equipment.
1.24 Categories of Message
The categories of messages handled by the aeronautical mobile service are in the
following order of priority:
a) Distress messages
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See Chapter 8 – Emergency Phraseology
b) Urgency messages
c) Communications relating
to direction finding
See Chapter 6 paragraph 1.7
d) Flight safety messages See Chapter 9 paragraph 1.6
e) Meteorological messages See Chapter 4 paragraph 7
f) Flight Regularity messages See Chapter 9 paragraph 1.6.
31 March 2011
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