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aeronautical fixed service, to the station(s) which hove failed
5.2.2.7.3 Notification of communications failure. The to acknowledge intercept.
air-ground control radio station shall notify the appropriate air
traffic services unit and the aircraft operating agency, as soon 5.2.3.1.2.3.1 PANS.- If; in abnormal circumstances.
as possible, of any failure in air-ground communication. forwarding is necessary using the air-ground channels, the
provisions of 5.2.2.3.4 should be observed
5.2.3 HF message handling
5.2.3.1 General
5.2.3.12.4 PANS.- When such forwarding is done over
the aeronautical b e d telecommunication network, the
messages should be addressed to the network station(s)
concerned
5.2.3.1.1 PANS.- When operating within a network, an 5.2.3.1.2.5 PANS.- The station(s) to which the
aircraji station should, in principle, whenever communications messages have been forwarded shDuld carry our local districonditions
so permit, transmit its messages to the stations of bution of them in the same way as had been received
the network from which they can be most readily delivered to directly from the aircraft over the air-ground channel.
their ultimate destinations. In particular, aircraft reports
required by air traffic services should be transmitted to the
network station serving the flight information centre or area
control centre in whose area the aircrafr is flying. Conversely,
messages to aircrafr in jlight should, whenever possible, be
transmitted directly to the aircmji by the network station
serving the location of the originator.
Note.- Exceptionally, an aircrafr may need to communicate
with an aeronautical station outside the network appropriate
to its particular route segment. This is permissible,
provided it can be done without interrupting the continuous
watch with the communication network appropriate to the
route segment, when such watch is required by the appropriate
ATS Authority, and provided it does not cause undue
interference with the opemtion of other aeronautical stations.
5.2.3.1.2.6 The aeronautical station receiving an airreport
or a message containing meteorological information
transmitted by an aircraft in flight shall forward the message
without delay:
1) to the air traffic services unit and meteorological offices
associated with the station:
2) to the aircraft operating agency concerned or its
representative when that agency has made a specific
request to receive such messages.
5.2.3.1.3 PANS.- The provisions of 5.2.3.1.2 should
also be applied, if practicable, in non-network operation.
w11/05
No. 80
Chapter 5 Annex 10 - Aeronautical Telecommunications
5.2.3.1.4 Recommendation.- When a message addressed
to an aircraji in flight is received by the aeronautical
station included in the address, and when that station is not
able to establish communication with the aircraji to which the
message is addressed, the message should be forwarded to
those aeronautical stations on the route which may be able to
establish communication with the aircraji.
Note.- This does not preclude the transmission by the
forwarding aeronautical station, of the original message to the
aircraji addressed, if the forwarding station is later able to
communicate with that aircraji.
5.2.3.1.4.1 Recommendation.- I f the aeronautical
station to which the message is addressed is unable to dispose
of the message in accordance with 5.2.3.1.4, the station of
origin should be advised.
a) each line should begin at the lefi margin;
b) a new line should be used for each transmission;
C ) each communication should contain some or all of the
following items in the order shown:
1) call sign of the calling station;
2) text of the message;
3) call sign of the station called or the receiving station,
followed by the appropriate abbreviation to indicate
"Received". "Readback", or "No reply heard";
4) call sign of station(s) acknowledging intercept
followed by appropriate abbreviation to indicate
"Received";
5.2.3.1.4.2 The aeronautical station forwarding the 5) designation of frequency used;
message shall amend the address thereof, by substituting for its
own location indicator the location -indicator of the
aeronautical station to which the message is being forwarded. 6) time in UTC of the communication;
d) missing parts of the message text should be indicated by
typing the three periods (space . space . space . space)
5.2.3.2 Transmission of ATS messages or three letters M (space A4 space M space M space);
to aircraji
e) correction of typing errors should be made by keyboard
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