Aviation English
Aircraft Systems

What is inertial reference unit?

inertial reference unit An aircraft system providing position and attitude data by processing gyroscopic and accelerometer inputs.

Source: ICAO Doc 9432, FAA PCG

How is “inertial reference unit” Used in Practice?

Inertial Reference Unit alignment in progress, expect minor delay before navigation data is available.

Certification Exam Relevance

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

Who Needs to Know This Term?

  • Pilots
  • Air Traffic Controllers
  • Cabin Crew

Related Aviation English Terms

air-data inertial reference unitInertial Navigation SystemInertial Reference Systemair-data reference

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Frequently Asked Questions

What is inertial reference unit?

An aircraft system providing position and attitude data by processing gyroscopic and accelerometer inputs.

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