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ATC clearances and communicationsQuestion 212 of 351

Your IFR aircraft cannot talk to the controller. What must you do about the frequency?

  1. Switch off the radio
  2. Leave the frequency and listen on 121.5 MHz only
  3. Keep a listening watch for control messages or further clearance
  4. Change to the tower frequency of the nearest aerodrome
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Correct answer: Keep a listening watch for control messages or further clearance

You must listen for control messages and acknowledge them by any means available, if possible.

Source: Canadian Aviation Regulations (SOR/96-433), CAR 602.137(1)(a) Two-way Radiocommunication Failure in IFR Flight

Practice atc clearances and communications

Questions last reviewed: 18 October 2026