Aviation English
Phonetic Alphabet

Sierra la gi?

Sierra The letter 'S' as spoken in the ICAO phonetic alphabet, used in ATC phraseology to identify taxiways, holding points, and aircraft callsigns.

Source: ICAO Doc 9432, FAA PCG

How is “Sierra” Used in Practice?

Sau khi hạ cánh, rời đường băng 12 qua Sierra và liên hệ ground trên 121.9 để lăn về bãi đỗ.

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

Sierra la gi?

The letter 'S' as spoken in the ICAO phonetic alphabet, used in ATC phraseology to identify taxiways, holding points, and aircraft callsigns.

Where can I learn this term for free?

Termify is a 100% free professional English app that teaches Sierra and 4,071+ other industry terms with native pronunciation, IPA transcriptions and career quizzes. Available on iOS in 23 languages. No subscription, no credit card required.

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