What is Four?
Four The ICAO/FAA radiotelephony spelling for the numeral '4'. Used to clearly communicate headings, altitudes, frequencies, and runway numbers in ATC transmissions.
Source: ICAO Doc 9432, FAA PCG
How is “Four” Used in Practice?
Descend and maintain four thousand feet, expect the ILS approach runway one four.
Certification Exam Relevance
Who Needs to Know This Term?
- Pilots
- Air Traffic Controllers
- Cabin Crew
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What is Four?
The ICAO/FAA radiotelephony spelling for the numeral '4'. Used to clearly communicate headings, altitudes, frequencies, and runway numbers in ATC transmissions.
Where can I learn this term for free?
Termify is a 100% free professional English app that teaches Four 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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