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change of route is to commence; revised time estimates;
alternate aerodrome(s); any other pertinent
information.
3.6.2.4 Weather deterioration below the VMC. When it
becomes evident that flight in VMC in accordance with its current
flight plan will not be practicable, a VFR flight'operated
as a controlled flight shall:
a) request an amended clearance enabling the aircraft to
continue in VMC to destination or to an alternative
aerodrome, or to leave the airspace within which an
ATC clearance is required; or
b) if no clearance in accordance with a) can be obtained,
continue to operate in VMC and notify the appropriate
ATC unit of the action being taken either to leave the
airspace concerned or to land at the nearest suitable
aerodrome; or
c) if operated within a control zone, request authorization
to operate as a special VFR flight; or
d) request clearance to operate in accordance with the
instrument flight rules.
3.6.3 Position reports
3.6.3.1 Unless exempted by the appropriate ATS authority
or by the appropriate air traffic services unit under conditions
Annex 2 - Rules of the Air Chapter 3
specified by that authority, a controlled flight shall report to the
appropriate air traffic services unit, as soon as possible, the
time and level of passing each designated compulsory reporting
point, together with any other required information. Position
reports shall similarly be made in relation to additional points
when requested by the appropriate air traffic services unit. In
the absence of designated reporting points, position reports
shall be made at intervals prescribed by the appropriate ATS
authority or specified by the appropriate air traffic services unit.
3.6.3.1.1 Controlled flights providing position information
to the appropriate air traffic services unit via data link communications
shall only provide voice position reports when
requested.
Note.- The conditions and circumstances in which SSR
Mode C transmission ofpressure-altitude satisJies the requirement
for level information in position reports are indicated in
the PANS-ATM (Doc 4444).
3.6.4 Termination of control
A controlled flight shall, except when landing at a controlled
aerodrome, advise the appropriate ATC unit as soon as it ceases
to be subject to air traffic control service.
3.6.5 Communications
a) continue to fly in visual meteorological conditions; land
at the nearest suitable aerodrome; and report its anival
by the most expeditious means to the appropriate air
traffic control unit;
b) if considered advisable, complete an IFR flight in
accordance with 3.6.5.2.2.
3.6.5.2.2 If in instrument meteorological conditions or
when the pilot of an IFR flight considers it inadvisable to complete
the flight in accordance with 3.6.5.2.1 a), the aircraft
shall:
a) unless otherwise prescribed on the basis of regional air
navigation agreement, in airspace where radar is not
used in the provision of air traffic control, maintain the
last assigned speed and level, or minimum flight altitude
if higher, for a period of 20 minutes following the
aircraft's failure to report its position over a compulsory
reporting point and thereafter adjust level and speed in
accordance with the filed flight plan;
b) in airspace where radar is used in the provision of air
traffic control, maintain the last assigned speed and
level, or minimum flight altitude if higher, for a period
of 7 minutes following:
1) the time the last assigned level or minimum flight
altitude is reached; or
3.6.5.1 An aircraft operated as a controlled flight shall 2) the time the transponder is set to Code 7600; or
maintain continuous air-ground voice communication watch
on the appropriate communication channel of, and establish 3) the aircraft's failure to report its position over a
two-way communication as necessary with, the appropriate air compulsory reporting point;
traffic control unit, except as may be prescribed by the appropriate
ATS authority in respect of aircraft forming part of whichever is later, and thereafter adjust level and speed
aerodrome traffic at a controlled aerodrome. in accordance with the filed flight plan;
Note I.- SELCAL or similar automatic signalling devices
satisfL the requirement to maintain an air-ground voice
communication watch.
Note 2.- The requirement for an aircraft to maintain an
air-ground voice communication watch remains in eflect after
CPDLC has been established. .
3.6.5.2 Communication failure. If a communication failure
precludes compliance with 3.6.5.1, the aircraft shall comply
with the voice communication failure procedures of Annex 10,
　
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