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ROC-A Radio Operator Certificate (Aeronautical) · Question

When an aircraft receives an instruction that cannot be complied with, what should the pilot do?

If a pilot receives an instruction they cannot comply with, they must immediately advise ATC with the phrase 'UNABLE' and provide the reason. This allows ATC to

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Question: When an aircraft receives an instruction that cannot be complied with, what should the pilot do?

Answer options:

  • Comply to the best of their ability and report upon completion.
  • Immediately declare an emergency. ✅ Advise Air Traffic Control (ATC) with 'UNABLE' and provide reasons if possible.
  • Ignore the instruction and continue their original plan.

Correct answer: Advise Air Traffic Control (ATC) with 'UNABLE' and provide reasons if possible.

Explanation: If a pilot receives an instruction they cannot comply with, they must immediately advise ATC with the phrase 'UNABLE' and provide the reason. This allows ATC to issue an alternative instruction and ensures safety.

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