Aviation English
Long Haul

晴天乱気流とは?

晴天乱気流 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 “晴天乱気流” Used in Practice?

晴天乱気流の遭遇、特にジェット気流付近での発生を報告してください。後続機のためです。

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

晴天乱気流とは?

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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