Aviation English
Long Haul

What is Clear Air Turbulence?

Clear Air Turbulence Turbulence that occurs in clear air, typically at high altitudes, away from thunderstorms and not associated with visible clouds, often found near jet streams or frontal zones.

Source: ICAO Doc 9432, FAA PCG

How is “Clear Air Turbulence” Used in Practice?

Report any encounter with clear air turbulence, especially near jet streams, for following traffic.

Certification Exam Relevance

ICAO Level 4ICAO Level 5ICAO Level 6EASA FCL.055

Who Needs to Know This Term?

  • Pilots
  • Air Traffic Controllers
  • Cabin Crew

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Frequently Asked Questions

What is Clear Air Turbulence?

Turbulence that occurs in clear air, typically at high altitudes, away from thunderstorms and not associated with visible clouds, often found near jet streams or frontal zones.

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