Page 37 - UK SERA Standardises European Rules of the Air Regulations (Consolidated) January 2022

SERA - Standardised European Rules of the Air

(a) in Class C — between VFR flights; and
(b) in Class D — between IFR and VFR flights or between VFR flights.
For the case of special VFR flights, refer to SERA.8005(b).
SERA.8015(b)(4) GM1 Air traffic control clearances
OPERATION SUBJECT TO CLEARANCE — POTENTIAL RECLEARANCE IN FLIGHT
The intent of the provision relating to potential reclearance is to facilitate reclearance to a revised
destination, normally beyond the filed destination aerodrome.
SERA.8015(d)(5) GM1 Air traffic control clearances
CONTENT OF THE CLEARANCES — TIME OF EXPIRY
The time of expiry of the clearance indicates the time after which the clearance will be automatically
cancelled if the flight has not been commenced.
SERA.8015(e)(1) GM1 Air traffic control clearances
The nature of the change should include a description of the route and levels to the point where it joins
the previously cleared route, or, if the aircraft will not re-join the previous route, to the destination.
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Centrik Regulations Team note: This item was due to be amended by EDD 2020/007/R however, the
applicability date for the changes fell after the EU exit date. Therefore, the amendments did not enter
UK Law and were not applied to this item.
SERA.8015(e)(4) GM1 Air traffic control clearances
READ-BACK OF CPDLC MESSAGES
When so indicated by local safety assessments, ANSP may require that the receipt of some of the
CPDLC message types (in particular those addressing trajectory changes) be acknowledged by voice.
SERA.8015(f)(2) GM1 Air traffic control clearances
PROVISIONS FOR CLEARANCES AND INSTRUCTIONS — ALTIMETRY
The provision of transition level may be accomplished by voice communications, ATIS broadcast or
data link.
SERA.8015(f)(4) GM1 Air traffic control clearances
COORDINATION OF CLEARANCES — DOWNSTREAM CLEARANCE
(a) In such cases it is assumed that contact of a downstream ATC unit is initiated by the pilot.
Therefore, the rules require that the aircraft maintain the necessary two-way
communication with the current ATC unit.
(b) In cases where an aircraft cannot maintain two-way communication whilst obtaining a
downstream clearance, the pilot needs to seek the acceptance to leave momentarily the
communication channel of the current ATC unit prior to contacting a downstream ATC unit.
SERA.8015(g) GM1 Air traffic control clearances
CONDITIONAL CLEARANCES
An example of a conditional clearance is ‘SCANDINAVIAN 941, BEHIND DC9 ON SHORT FINAL, LINE
UP BEHIND’. This implies the need for the aircraft receiving the conditional clearance to identify the
aircraft or vehicle causing the conditional clearance.
SERA.8020 Adherence to flight plan
(a) Except as provided for in (b) and (d) 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.
(1) Unless otherwise authorised by the competent authority, or directed by the
appropriate air traffic control unit, controlled flights shall, in so far as practicable:
(i) when on an established ATS route, operate along the defined centre line of that
route; or
(ii) when on any other route, operate directly between the navigation facilities
and/or points defining that route.
(2) Unless otherwise authorised by the competent authority, or directed by the
appropriate air traffic control unit, 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) Deviation from the requirements in point (1) shall be notified to the appropriate ATS
unit.
(b) Inadvertent changes. In the event that a controlled flight inadvertently deviates from its
current flight plan, the following action shall be taken:
(1) Deviation from track: if the aircraft is off track, action shall be taken forthwith to adjust
the heading of the aircraft to regain track as soon as practicable.
(2) 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 traffic services unit
shall be so informed.
(3) Change in time estimate: if the time estimate for the next applicable reporting point,
flight information region boundary or destination aerodrome, whichever comes first,
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