Clearances and Instructions
10.01 An ATC instruction
(1) must be complied with when received by the pilot providing
the safety of the aircraft is not jeopardized.
(2) must be "read back" in full to
the controller and confirmed before becoming effective.
(3) is in effect advice provided
by ATC and does not require acceptance or formal acknowledgement by the pilot
(4) is the same as an ATC clearance.
10.02 An ATC clearance
(1) is the same as an ATC instruction.
(2) is in effect advice provided
by ATC and does not require acceptance or acknowledgement by the PIC.
(3) requires compliance when accepted by the PIC.
(4) must be complied with when received
by the PIC.
10.03 A pilot, after accepting a clearance and
subsequently finding that all or part of the clearance cannot be complied
(1) disregard the clearance.
(2) comply with only the part that
(3) comply as best as possible under
the circumstances to carry out the clearance and need not say anything to
(4) comply as best as possible under the circumstances and
advise ATC as soon as possible.
10.04 After accepting a clearance and subsequently
finding that it cannot be complied with, a pilot should
(1) take any immediate action required and advise ATC as soon
(2) comply as best as possible under
the circumstances and say nothing to ATC.
(3) disregard the clearance.
(4) comply with the suitable parts.
10.05 An ATC clearance or instruction is predicated
on known traffic only. Therefore, when a pilot is proceeding in accordance
with a clearance or instruction
(1) ATC is relieved of the responsibility
for traffic separation.
(2) the responsibility for traffic
separation is divided between ATC and the pilot.
(3) the pilot is not relieved of the responsibility for traffic
(4) the pilot is relieved of the
responsibility for traffic avoidance.
10.06 If all or part of an ATC clearance is unacceptable,
a pilot should
(1) comply as best as possible under
(2) refuse the clearance without
giving a reason for refusal.
(3) acknowledge the clearance and
read back only the acceptable parts.
(4) refuse the clearance and inform ATC of the pilots intentions.
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This page written 8 October 2002 by Robyn Stewart. Last
revised 8 October 2002.
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