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operators on duty except that other persons having lcnowledge
of facts pertinent to the entries may certify in the log the
accuracy of operators' entries.
3.5.1.3 All entries shall be complete, clear, correct and
intelligible. Superfluous marks or notations shall not be made
in the log.
3.5.1.4 In written logs, any necessary correction in the log
shall be made only by the person making the initial entry. The
correction shall be accomplished by drawing or typing a single
line through the incorrect entry, initialling same, recording the
time and date of correction. The correct entry shall be made on
the next line after the last entry.
3.5.1.5 Telecommunication logs, written or automatic,
shall be retained for a period of at least thirty days. When logs
are pertinent to inquiries or investigations they shall be
retained for longer periods until it is evident that they will be
no longer required.
3.5.1.6 The following information shall be entered in
written logs:
Chapter 3 Annex 10 - Aeronautical Telecommunications
a) the name of the agency operating the station;
b) the identification of the station;
c) the date;
d) the time of opening and closing the station;
e) the signature of each operator, with the time the operator
assumes and relinquishes a watch;
f) the frequencies being guarded and type of watch
(continuous or scheduled) being maintained on each
frequency;
g) except at intermediate mechanical relay stations where
the provisions of this paragraph need not be complied
with, a record of each communication, test transmission,
or attempted communication showing text of communication,
time communication completed, station(s) communicated
with, and frequency used. The text of the
communication may be omitted from the log when
copies of the messages handled are available and form
part of the log;
h) all distress communications and action thereon;
i) a brief description of communication conditions and
difficulties, including harmful interference. Such entries
should include, whenever practicable, the time at which
interference was experienced, the character, radio
frequency and identification of the interfering signal;
j) a brief description of interruption to communications
due to equipment failure or other troubles, giving the
duration of the interruption and action talcen;
I) such additional information as may be considered by the
operator to be of value as a part of the record of the
station's operations.
3.6 Establishment of
radiocommunication
3.6.1 All stations shall answer calls directed to them by
other stations in the aeronautical telecommunication service
and shall exchange communications on request.
3.6.2 All stations shall radiate the minimum power
necessary to ensure a satisfactory service.
3.7 Use of abbreviations
and codes
3.7.1 Abbreviations and codes shall be used in the international
aeronautical telecommunication service whenever
they are appropriate and their use will shorten or otherwise
facilitate communication.
3.7.1.1 Where abbreviations and codes other than those
approved by ICAO are contained in the text of messages, the
originator shall, if so required by the aeronautical telecommunication
station accepting the message for transmission,
make available to that station a decode for the abbreviations
and codes used.
N o t e . The use of ICAO approved abbreviations and codes
wherever appropriate - fov example, those contained in
PANS-ABC (Doc 8400) - obviates the need,for application of
the provisions of 3.7.1.1.
3.8 Cancellation of
messages
Messages shall be cancelled by a telecommunication station
only when cancellation is authorized by the message originator.
CHAPTER 4. AERONAUTICAL FIXED SERVICE (AFS)
4.1 General
4.1.1 The aeronautical fixed service shall comprise the
following systems and applications that are used for groundground
(i.e. point-to-point andlor point-to-multipoint)
communications in the international aeronautical telecommunication
service:
a) ATS direct speech circuits and networlcs;
b) meteorological operational circuits, networlcs and broadcast
systems;
c) the aeronautical fixed telecommunications network
(AFTN);
d) the common ICAO data interchange network (CIDIN);
e) the air traffic services (ATS) message handling services;
and
f) the inter-centre communications (ICC).
Note I . ProviLsion,s relating to ATS direct speech
communications are contained in 4.2.
Note 2.- Prnvisions relating to meteorological operational
channels and meteorological operational telecommunication
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