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necessary manoeuvre consistent with safe operation of the
aircraft.
6.3.1.2 At aerodromes where standard instrument
departures (SIDs) have been established, departing aircraft
should normally be cleared to follow the appropriate SID.
6.3.2 Standard clearances for
departing aircraft
6.3.2.1 GENERAL
The appropriate ATS authority should, wherever possible,
establish standardized procedures for transfer of control
between the ATC units concerned, and standard clearances for
departing aircraft.
Note.— The provisions applying to standardized
procedures for coordination and transfer of control are
specified in Chapter 10, Section 10.4.1.
6.3.2.2 COORDINATION
6.3.2.2.1 Where standard clearances for departing
aircraft have been agreed to between the units concerned, the
aerodrome control tower will normally issue the appropriate
standard clearance without prior coordination with or approval
from the approach control unit or ACC.
6-2 Air Traffic Management (PANS-ATM)
1/11/01
6.3.2.2.2 Prior coordination of clearances should be
required only in the event that a variation to the standard
clearance or the standardized transfer of control procedures is
necessary or desirable for operational reasons.
6.3.2.2.3 Provision shall be made to ensure that the
approach control unit at all times is kept informed of the
sequence in which aircraft will depart as well as the runway to
be used.
6.3.2.2.4 Provision shall be made to display the designators
of assigned SIDs to the aerodrome control tower, the
approach control unit and/or the ACC as applicable.
6.3.2.3 CONTENTS
Standard clearances for departing aircraft shall contain the
following items:
a) aircraft identification;
b) clearance limit, normally destination aerodrome;
c) designator of the assigned SID, if applicable;
d) initial level, except when this element is included in
the SID description;
e) allocated SSR code;
f) any other necessary instructions or information not
contained in the SID description, e.g. instructions
relating to change of frequency.
6.3.2.4 COMMUNICATION FAILURE
6.3.2.4.1 Clearances for departing aircraft may specify
an initial or intermediate level other than that indicated in the
filed flight plan for the en route phase of flight, without a time
or geographical limit for the initial level. Such clearances will
normally be used to facilitate the application of tactical control
methods by ATC, normally through the use of radar.
6.3.2.4.2 Where clearances for departing aircraft
containing no time or geographical limit for an initial or
intermediate level are utilized, action to be taken by an aircraft
experiencing air-ground communication failure in the event the
aircraft has been radar vectored away from the route specified
in its current flight plan, should be prescribed on the basis of
a regional air navigation agreement and included in the SID
description or published in AIPs.
6.3.3 Departure sequence
6.3.3.1 Departing aircraft may be expedited by
suggesting a take-off direction which is not into the wind. It is
the responsibility of the pilot-in-command of an aircraft to
decide between making such a take-off or waiting for take-off
in a preferred direction.
6.3.3.2 If departures are delayed, the delayed flights shall
normally be cleared in an order based on their estimated time
of departure, except that deviation from this order may be
made to:
a) facilitate the maximum number of departures with the
least average delay;
b) accommodate requests by an operator in respect of that
operator’s flights to the extent practicable.
6.3.3.3 Air traffic control units should when practicable
advise aircraft operators or their designated representatives
when anticipated delays are expected to exceed 30 minutes.
6.4 INFORMATION FOR DEPARTING
AIRCRAFT
Note.— See Chapter 11, 11.4.3, regarding flight
information messages.
6.4.1 Meteorological conditions
Information regarding significant changes in the
meteorological conditions in the take-off or climb-out area,
obtained by the unit providing approach control service after a
departing aircraft has established communication with such
unit, shall be transmitted to the aircraft without delay, except
when it is known that the aircraft already has received the
information.
Note.— Significant changes in this context include those
relating to surface wind direction or speed, visibility, runway
visual range or air temperature (for turbine-engined aircraft),
and the occurrence of thunderstorm or cumulonimbus,
　
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