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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
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,
5/11/98
No. 34
Annex 2 — Rules of the Air Chapter 3
14
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 of pressure-altitude satisfies 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
3.6.5.1 An aircraft operated as a controlled flight shall
maintain continuous air-ground voice communication watch
on the appropriate communication channel of, and establish
two-way communication as necessary with, the appropriate air
traffic control unit, except as may be prescribed by the
appropriate ATS authority in respect of aircraft forming part of
aerodrome traffic at a controlled aerodrome.
Note 1.— SELCAL or similar automatic signalling devices
satisfy the requirement to maintain an air-ground voice
communication watch.
Note 2.— The requirement for an aircraft to maintain airground
voice communication watch remains in effect 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 communication failure procedures of Annex 10,
Volume II, and with such of the following procedures as are
appropriate. In addition, the aircraft, when forming part of the
aerodrome traffic at a controlled aerodrome, shall keep a watch
for such instructions as may be issued by visual signals.
3.6.5.2.1 If in visual meteorological conditions, the
aircraft shall:
a) continue to fly in visual meteorological conditions;
b) land at the nearest suitable aerodrome; and
c) report its arrival by the most expeditious means to the
appropriate air traffic control unit.
3.6.5.2.2 If in instrument meteorological conditions or
when conditions are such that it does not appear feasible to
complete the flight in accordance with 3.6.5.2.1 (see Note 1),
the aircraft shall:
a) unless otherwise prescribed on the basis of regional air
navigation agreement, 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) proceed according to the current flight plan route to the
appropriate designated navigation aid serving the
destination aerodrome and, when required to ensure
compliance with c) below, hold over this aid until
commencement of descent;
c) commence descent from the navigation aid specified in
b) at, or as close as possible to, the expected approach
time last received and acknowledged; or, if no expected
approach time has been received and acknowledged, at,
or as close as possible to, the estimated time of arrival
resulting from the current flight plan;
d) complete a normal instrument approach procedure as
specified for the designated navigation aid; and
e) land, if possible, within thirty minutes after the
estimated time of arrival specified in c) or the last
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