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traffic, and, in the other case, adequate separation between
aircraji operating on both sides of the common boundary.
3.4.2 Details of the selected separation minima and of
their areas of application shall be notified..
a) to the ATS units concerned, and
b) to pilots and operators through aeronautical information
Note.- The number of separate monitoring programmes publications, wbere separation is based on the use by
should be restricted to the minimum necessary to effectively aircraft of specified navigation aids w specified navigation
provide the required services for the region. techniques.
3.3.4.2 Arrangements shall be put in place, through interregional
agreement, for the sharing between regions of data
from monitoring programmes.
3.5 Responsibility for control
Note.- Guidance material relating to vertical separation 3.5.1 Responsibility for control
and monitoring of height-keeping performance is contained in of individual flights
the Manual on Implementation of a 300 m (1 000 ft) Vertical
Separation Minimum Between FL 290 and FL 410 Inclusive A controlled flight shall be under the control of only one air
(DOC9 574). traffic control unit at any given time.
-WlY o5 No. 43
Annex I1 - Air TrqfFc Services Chapter 3
3.6.2.2.1 Where transfer of control is to be effected using
radar data, the control information pertinent to the transfer
shall include information regarding the position and, if
required, the uack and speed of the aircraft, as observed by
radar immediately prior to the transfer.
3.6.2.2.2 Where transfer of control is to be effected using
ADS data, the control information pertinent to the transfer shall
include the four-dimensional position and other infonnation as
necessary.
3.6.2.3 The accepting control unit shall:
a) indicate its ability to accept control of the aircraft on the
terms specified by the transferring control unit, unless
by prior agreement between the two units concerned, the
absence of any such indication is understood to signify
acceptance of the terms specified, or indicate any
necessary changes thereto; and
b) specify any other information or clearance for a subsequent
portion of the flight, which it requires the aircraft
to have at the time of transfer.
3.6.2.4 The accepting control unit shall notify the
transferring control unit when it has established two-way voice
e) any necessary instructions or information on other
matters such as approach or departure manoeuvres,
communications and the time of expiry of the clearance.
Note.- The time of expiry of the clearance indicates
the time after which the clearance will be automatically
cancelled if the flight has not been commenced
3.7.1.2 Recommendation.- Standard departure and
arrival routes and associated procedures should be established
when necessary to facilitate:
a) the safe, orderly and expeditious flow of air traffic;
b) the description of the route and procedure in air traffic
control clearances.
Note.- Material relating to the establishment of standard
departure and arrival routes and associated procedures is
contained in the Air Traffic Services Planning Manual
(Doc 9426). The design criteria are contained in PANS-OPS,
Volume I1 (Doc 8168).
3.7.2 Clearances for transonic flight
and/or data link communications with and assumed control
of the aircraft concerned, unless otherwise specified by agree- 3.7.2.1 The air traffic control clearance relating to the
ment between the two control units concerned. transonic acceleration phase of a supersonic flight shall extend
at least to the end of that phase.
3.6.2.5 Applicable coordination procedures, including
transfer of control points, shall be specified in letters of agree- 3.7.2.2 Recommendation.- The air trafic control clearment
and ATS unit instructions as appropriate. once relating to the deceleration and descent of an aircraft
from supersonic cruise to subsonic flight should provide for
uninterrupted descent, at least during the transonic phase.
3.7 Air traffic control clearances
Air traffic control clearances shall be based solely on the
requirements for providing air traffic control service.
3.7.1 Contents of clearances
3.7.1.1 An air traffic control clearance shall indicate:
a) aircraft identification as shown in the flight plan;
b) clearance limit;
C) mute of flight;
d) level(s) of flight for the entire route or part thereof and
changes of levels if required;
Note.- If the clearance for the levels covers only
part of the route, it is important for the air traffic
control unit to specify a point to which the part of the
clearance regarding levels applies whenever necessary
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