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What is Altitude Constraint?

Altitude Constraint A published or assigned restriction that requires an aircraft to cross a specific point at, above, or below a certain altitude, common in RNAV and STAR procedures.

Source: ICAO Doc 9432, FAA PCG

How is “Altitude Constraint” Used in Practice?

Comply with altitude constraint at waypoint KADAR, cross at or above flight level two-three-zero.

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 Altitude Constraint?

A published or assigned restriction that requires an aircraft to cross a specific point at, above, or below a certain altitude, common in RNAV and STAR procedures.

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