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used at night or in low visibility.
3.6.1.3 Potential reclearance inflight. If prior to departure
it is anticipated that depending on he1 endurance and subject to
reclearance in flight, a decision may be taken to proceed to a
revised destination aerodrome, the appropriate air traffic control
units shall be so notified by the insertion in the flight plan
of information concerning the revised route (where known) and
the revised destination.
Note.- The intent of this provision is to facilitate a
reclearance to a revised destination, normally beyond thejiled
destination aerodrome.
Chapter 3 Annex 2 -Rules of the Air
3.6.1.4 An aircraft operated on a controlled aerodrome
shall not taxi on the manoeuvring area without clearance from
the aerodrome control tower and shall comply with any
instructions given by that unit.
3.6.2 Adherence to flight plan
3.6.2.1 Except as provided for in 3.6.2.2 and 3.6.2.4, an
aircraft shall adhere to the current flight plan or the applicable
portion of a current flight plan submitted for a controlled flight
unless a request for a change has been made and clearance
obtained from the appropriate air traffic control unit, or unless
an emergency situation arises which necessitates immediate
action by the aircraft, in which event as soon as circumstances
permit, after such emergency authority is exercised, the appropriate
air traffic services unit shall be notified of the action
taken and that this action has been taken under emergency
authority.
3.6.2.1.1 Unless otherwise authorized by the appropriate
ATS authority, or directed by the appropriate air traffic control
unit, controlled flights shall, in so far as practicable:
a) when on an established ATS route, operate along the
defined centre line of that route; or
b) when on any other route, operate directly between the
navigation facilities andlor points defining that route.
3.6.2.1.2 Subject to the overriding requirement in
3.6.2.1.1, an aircraft operating along an ATS route segment
defined by reference to very high frequency omnidirectional
radio ranges shall change over for its primary navigation
guidance from the facility behind the aircraft to that ahead of
it at, or as close as operationally feasible to, the changeover
point, where established.
3.6.2.1.3 Deviation from the requirements in 3.6.2.1.1
shall be notified to the appropriate air traffic services unit.
3.6.2.2 Inadvertent changes. In the event that a controlled
flight inadvertently deviates from its current flight plan, the
following action shall be taken:
a) Deviation >om track: if the aircraft is off track, actjon
shall be taken forthwith to adjust the heading of the aircraft
to regain track as soon as practicable.
b) Variation in true airspeed: if the average true airspeed at
cruising level between reporting points varies or is
expected to vary by plus or minus 5 per cent of the true
airspeed, from that given in the flight plan, the appropriate
air trafflc services unit shall be so informed.
c) Change in time estimate: if the time estimate for the next
applicable reporting point, flight information region
boundary or destination aerodrome, whichever comes
first, is found to be in error in excess of 3 minutes from
that notified to air traffic services, or such other period
of time as is prescribed by the appropriate ATS authority
or on the basis of air navigation regional agreements, a
revised estimated time shall be notified as soon as
possible to the appropriate air traffic services unit.
3.6.2.2.1 Additionally, when an ADS agreement is in place,
the air trafflc services unit (ATSU) shall be informed automatically
via data link whenever changes occur beyond the
threshold values stipulated by the ADS event contract.
3.6.2.3 Intended changes. Requests for flight plan changes
shall include information as indicated hereunder:
a) Change of cruising level: aircraft identification; requested
new cruising level and cruising speed at this level, revised
time estimates (when applicable) at subsequent flight
information region boundaries.
b) Change of route:
1) Destination unchanged: aircraft identification; flight
rules; description of new route of flight including
related flight plan data beginning with the position
from which requested change of route is to commence;
revised time estimates; any other pertinent
information.
2) Destination changed: aircraft identification; flight
rules; description of revised route of flight to revised
destination aerodrome including related flight plan
data, beginning with the position from which requested
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附件2－Rules of the Air－10ed(19)
