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are specified in Annex 10, Volumes 11 and V.
6.1.1.2 When direct pilot-controller two-way radiotelephony
or data link communications are used for the
provision of air traffic control service, recording facilities shall
be provided on all such air-ground communication channels.
Nore.- Requirements for retention of all automatic recordings
of communications in ATC are specified in Annex 10,
Volume 11, 3.5.1.5.
6.1.1.3 Recordings of communications channels as
required in paragraph 6.1.1.2 shall be retained for a period of
at least thirty days.
6.1.2 For flight information service
6.1.2.1 Air-ground communication facilities shall enable
two-way comm&cations to take place between a unit providing
flight information service and appropriately equipped
aircraft flying anywhere within the flight information region.
6.1.2.2 Recommendation- Whenever practicable, airground
communication facilities for flight information service
should permit direct, rapid, continuous and static-free two-way
communications.
6.1.3.3 Recommendation.- Where air-ground voice
communication channels are used for area control service and
are worked by air-ground communicators, suitable arrangements
should be made to permit direct pilot-controller voice
communications, as and when required.
6.1.4 For approach control service
6.1.4.1 Air-ground communication facilities shall enable
direct, rapid, continuous and static-free two-way communications
to take place between the unit providing approach
control service and appropriately equipped aircraft under its
control.
6.1.4.2 Where the unit providing approach control service
functions as a separate unit, air-ground communications shall
be conducted over communication channels provided for its
exclusive use.
6.1.5 For aerodrome control service
6.1.5.1 Air-ground communication facilities shall enable
direct, rapid, continuous and static-free two-way communications
to take place between an aerodrome control tower and
appropriately equipped aircraft operating at any distance within
45 km (25 NM) of the aerodrome concerned.
6.1.5.2 Recommendation.- Where conditions warrant,
separate communication channels should be provided for the
control of trafic operating on the manoeuvring area.
6.2 Aeronautical Fixed service
(ground-ground communications)
6.1.3 For area control service 6.2.1 General
6.1.3.1 Air-ground communication facilities shall enable
two-way communications to take place between a unit providing
area control service and appropriately equipped aircraft
flying anywhere within the control area(s).
6.1.3.2 Recommendation- Whenever practicable, airground
communication facilities for area control service
should permit direct, rapid, continuous and static-free two-way
communications.
6.2.1.1 Direct-speech andlor data link communications
shall be used in ground-ground communications for air traffic
services purposes.
Note 1.- Indication by time of the speed with which the
communication should be established is provided as a guide to
cornmication services, particularly to determine the types of
communication channels required, e.g. that "instantaneous" is
intended to refer to communications which effectively provide
ANNEX 11
Annex I1 - Air Tmffic Services Chapter 6
for immediate access between controllers; 'Ififreen seconds" to a) appropriate military units;
accept switchboard operation and 'yve minutes" to mean
methods involving retransmission. b) the metearological office serving the centre;
Note 2.- Requirements for retention of all automatic c) the aeronautical telecommunications station serving the
recordings of communications in ATC are specifed in centre;
Annex 10, Volume 11, 3.5.1.5.
d) appropriate operator's offices;
6.2.2 Communications within a
flight information region
6.2.2.1 Communications between air trafJic
services units
e) the rescue coordination centre or, in the absence of such
centre, any other appropriate emergency service;
f ) the international NOTAM office serving the centre.
6.2.2.2.2 An a.o*u roach control unit and an aerodrome
6.2.2.1.1 A flight centre shall have facilities control tower shall have facilities for communications with the
for with the following units providing a following units providing a service within their respective area
service within its area of responsibility: of responsibility:
a) the area control centre, unless collocated;
b) approach control units;
c) aerodrome control towers.
6.2.2.1.2 An area control centre, in addition to being
connected to the flight information centre as prescribed in
　
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