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addressee.
*Tributary station. An aeronautical fixed station that may
receive or transmit messages andlor digital data but which
does not relay except for the purpose of serving similar
stations connected through it to a communication centre.
3. For use in aeronautical
mobile sewice planning
*Aerodrome control radio station. A station providing radiocommunication
between an aerodrome control tower and
aircraft or mobile aeronautical stations.
*Aeronautical mobile service. A mobile service between
aeronautical stations and aircraft stations, or between
aircraft stations, in which survival craft stations may
participate; emergency position-indicating radiobeacon
stations may also participate in this service on designated
distress and emergency frequencies.
1/11/01 ATT A-2
Attachment A Annex 10 - Aeronautical Telecommunications
*Aeronautical station. A land station in the aeronautical
mobile service. In certain instances, an aeronautical station
may be placed on board a ship or an earth satellite.
*Aircraft station. A mobile station in the aeronautical mobile
service, other than a survival craft station, located on board
an aircraft.
*Air-ground communication. Two-way communication between
aircraft and stations or locations on the surface of the earth.
*Air-ground control radio station. An aeronautical
telecommunication station having primary responsibility for
handling communications pertaining to the operation and
control of aircraft in a given area.
*Air-to-ground communication. One-way communication
from aircraft to stations or locations on the surface of the
earth.
*Alternative means of communication. A means of
communication provided with equal status, and in addition
to the primary means.
General purpose system (GP). Air-ground radiotelephony
facilities providing for all categories of traffic listed in
5.1.8.
N o t e . In this system communication is normally
indirect, i.e. exchanged through the intermediary of a third
person.
*Ground-to-air communication. One-way communication
from stations or locations on the surface of the earth to
aircraft.
*Non-network communications. Radiotelephony communications
conducted by a station of the aeronautical mobile
service, other than those conducted as part of a radiotelephony
network.
*Operational control communications. Communications
required for the exercise of authority over the initiation,
continuation, diversion or termination of a flight in the
interest of the safety of the aircraft and the regularity and
efficiency of a flight.
N o t e . Such communications are normally required,for
the exchange of messages between aircraft and aircrqft
operating agencies.
"Pilot-controller" system. Air-ground radiotelephony facilities
implemented primarily to provide a means of direct
communication between pilots and controllers.
*Primary means of communication. The means of communication
to be adopted normally by aircraft and ground
stations as a first choice where alternative means of
communication exists.
"Radiotelephony network. A group of radiotelephony aeronautical
stations which operate on and guard frequencies
from the same family and which support each other in a
defined manner to ensure maximum dependability of airground
communications and dissemination of air-ground
traffic.
'Regular station. A station selected from those forming an enroute
air-ground radiotelephony network to communicate
with or to intercept communications from aircraft in normal
conditions.
ATT A-3
Attachment B to Volume I1 -
GUIDANCE MATERIAL FOR THE TRANSMISSION OF
LONG MESSAGES ON THE AFTN
1. Introduction
The requirement for the transmission of separate messages
over the AFTN when a text exceeding 1 800 characters is
encountered is detailed in 4.4.5.7 and 4.4.15.3.11. When
messages have to be divided into two or more parts, the
following procedure should be applied.
2. Procedure
Each message part should carry the same address and origin
with the sequence of each part indicated on the last line of text
as follows:
(End of first message) //END PART 01 / I
(End of second message) //ENDPARTO2/1
... etc. ...
(End of last message) / / END PART XXtXX / I
N o t e . The following example illustrates the application of
the a hove procedure, for a three-part message. The message
part sequence information is included in the text character
count.
a) First message:
(Address)
(Origin)
(Text)
(Ending)
h) Second message:
　
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