Practice question

Under ICAO Doc 4444, what is the definition of 'Transition Level'?

  1. The lowest flight level available for use above the transition altitude
  2. The altitude at or below which vertical position is referenced to QNH
  3. The fixed altitude of 10,000 ft AMSL across all global FIRs
  4. The height above touchdown zone at which visual contact is mandatory

Answer: A — The lowest flight level available for use above the transition altitude

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