曝光台 注意防骗
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with the aim of achieving the desired interval
between successive landings on the runway while
respecting the applicable separation minima at all
times, including the period of runway occupancy.
6.5.6.2.1.2 The time at which aircraft should pass the
specified point shall be determined by the unit providing
approach control service and notified to the aircraft sufficiently
in advance to permit the pilot to arrange the flight path
accordingly.
6.5.6.2.1.3 Each aircraft in the approach sequence shall
be cleared to pass the specified point inbound at the previously
notified time, or any revision thereof, after the preceding
aircraft has reported passing the point inbound.
6.5.6.2.2 INTERVAL BETWEEN SUCCESSIVE APPROACHES
In determining the time interval or longitudinal distance to be
applied between successive approaching aircraft, the relative
speeds between succeeding aircraft, the distance from the
specified point to the runway, the need to apply wake
turbulence separation, runway occupancy times, the prevailing
weather conditions as well as any condition which may affect
runway occupancy times shall be considered. When radar is
used to establish an approach sequence, the minimum distance
to be established between succeeding aircraft shall be specified
in local instructions. Local instructions shall additionally
specify the circumstances under which any increased
longitudinal distance between approaches may be required as
well as the minima to be used under such circumstances.
6.5.6.2.3 INFORMATION ON APPROACH SEQUENCE
Provision shall be made to ensure that the aerodrome control
tower is kept informed of the sequence in which aircraft will
be established on final approach for landing.
Note 1.— Guidance material on factors to be taken into
account when determining separation for timed approaches is
contained in the Air Traffic Services Planning Manual
(Doc 9426).
Note 2.— Wake turbulence categories and non-radar wake
turbulence longitudinal separation minima are contained in
Chapter 4, Section 4.9 and Chapter 5, Section 5.8,
respectively.
Note 3.— Detailed characteristics of wake vortices and
their effect on aircraft are contained in the Air Traffic Services
Planning Manual (Doc 9426), Part II, Section 5.
6.5.7 Expected approach time
6.5.7.1 An expected approach time shall be determined
for an arriving aircraft that will be subjected to a delay of 10
minutes or more or such other period as has been determined
by the appropriate authority. The expected approach time shall
be transmitted to the aircraft as soon as practicable and
preferably not later than at the commencement of its initial
descent from cruising level. A revised expected approach time
shall be transmitted to the aircraft without delay whenever it
differs from that previously transmitted by 5 minutes or more,
or such lesser period of time as has been established by the
appropriate ATS authority or agreed between the ATS units
concerned.
6.5.7.2 An expected approach time shall be transmitted
to the aircraft by the most expeditious means whenever it is
anticipated that the aircraft will be required to hold for
30 minutes or more.
6.5.7.3 The holding point to which an expected approach
time relates shall be identified together with the expected
approach time whenever circumstances are such that this
would not otherwise be evident to the pilot.
Chapter 6. Visual Separation in the Vicinity of Aerodromes 6-7
1/11/01
6.5.8 Onward clearance time
In the event an aircraft is held en route or at a location or aid
other than the initial approach fix, the aircraft concerned shall,
as soon as practicable, be given an expected onward clearance
time from the holding point. The aircraft shall also be advised
if further holding at subsequent holding points is expected.
Note.— “Onward clearance time” is the time at which an
aircraft can expect to leave the point at which it is being held.
6.6 INFORMATION FOR ARRIVING
AIRCRAFT
Note.— See Chapter 11, 11.4.3 regarding flight information
messages.
6.6.1 As early as practicable after an aircraft has
established communication with the unit providing approach
control service, the following elements of information, in the
order listed, shall be transmitted to the aircraft, with the
exception of such elements which it is known the aircraft has
already received:
a) type of approach and runway-in-use;
b) meteorological information, as follows:
1) surface wind direction and speed, including
significant variations;
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