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responsibility the aircraft is operating.
5.3.2.2 Action by the station addressed or Jirst
station acknowledging the distress message
5.3.2.2.1 The station addressed by aircraft in distress, or
first station acknowledging the distress message, shall:
a) immediately acknowledge the distress message;
b) take control of the communications or specifically and
clearly transfer that responsibility, advising the aircraft if
a transfer is made;
c) take immediate action to ensure that all necessary
information is made available, as soon as possible, to:
1) the ATS unit concerned;
2) the aircraft operating agency concerned, or its
representative, in accordance with pre-established
arrangements;
N o t e . The requirement to inform the aircraft
operating agency concerned does not have priority
over any other action which involves the safety of the
flight in distress, or of any other flight in the area, or
which might affect the progress of expectedjlights in
the area.
d) warn other stations, as appropriate, in order to prevent
the transfer of traffic to the frequency of the distress
communication.
5.3.2.3 Imposition of silence
5.3.2.3.1 The station in distress, or the station in control
of distress traffic, shall be permitted to impose silence, either
on all stations of the mobile service in the area or on any
station which interferes with the distress traffic. It shall
address these instructions "to all stations", or to one station
only, according to circumstances. In either case, it shall use:
- STOP TRANSMITTING:
- the radiotelephony distress signal MAYDAY
5.3.2.3.2 The use of the signals specified in 5.3.2.3.1 shall
be reserved for the aircraft station in distress and for the
station controlling the distress traffic.
e) any station taking any means at its disposal to assist an
aircraft in distress;
5.3.2.4 Action by all other stations
J3 any variation on the elements listed under 5.3.2.1.1 b),
when the transmitting station is not itself in distress,
provided that such circumstance is clearly stated in the
distress message.
5.3.2.4.1 The distress communications have absolute
priority over all other communications, and a station aware of
them shall not transmit on the frequency concerned, unless:
Annex 10 - Aeronautical Telecomrmtnications Volume I1
a) the distress is cancelled or the distress traffic is
terminated:
b) all distress traffic has been transferred to other
frequencies;
c) the station controlling communications gives permission;
d) it has itself to render assistance
5.3.2.4.2 Any station which has knowledge of distress
traffic, and which cannot itself assist the station in distress,
shall nevertheless continue listening to such traffic until it is
evident that assistance is being provided.
5.3.2.5 Termination of distress communications
and of silence
5.3.2.5.1 When an aircraft is no longer in distress, it shall
transmit a message cancelling the distress condition.
5.3.2.5.2 When the station which has controlled the
distress communication traffic becomes aware that the distress
condition is ended, it shall take immediate action to ensure that
this information is made available, as soon as possible, to:
1) the ATS unit concerned;
2) the aircraft operating agency concerned, or its representative,
in accordance with pre-established arrangements.
5.3.2.5.3 The distress communication and silence
conditions shall be terminated by transmitting a message,
including the words "DISTRESS TRAFFIC ENDED", on the
frequency or frequencies being used for the distress traffic.
This message shall be originated only by the station controlling
the communications when, after the reception of the
message prescribed in 5.3.2.5.1, it is authorized to do so by the
appropriate authority.
5.3.3 Radiotelephony urgency
communications
5.3.3.1 Action by the aircraft reporting
an urgency condition except
as indicated in 5.3.3.4
5.3.3.1.1 In addition to being preceded by the
radiotelephony urgency signal PAN PAN (see 5.3.1.2),
preferably spoken three times and each word of the group
pronounced as the French word "panne", the urgency message
to be sent by an aircraft reporting an urgency condition shall:
a) be on the air-ground frequency in use at the time;
b) consist of as many as required of the following elements
spoken distinctly and, if possible, in the following order:
1) the name of the station addressed;
2) the identification of the aircraft;
3) the nature of the urgency condition;
4) the intention of the person in command;
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