What is One?
One The digit '1' as spoken in the ICAO radiotelephony alphabet, pronounced as 'One' for clarity in all numerical transmissions, including headings, frequencies, and flight levels.
Source: ICAO Doc 9432, FAA PCG
How is “One” Used in Practice?
Contact tower on frequency one one eight decimal one, cleared to land Runway One Six Left.
Certification Exam Relevance
Who Needs to Know This Term?
- Pilots
- Air Traffic Controllers
- Cabin Crew
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Download Free for iOSFrequently Asked Questions
What is One?
The digit '1' as spoken in the ICAO radiotelephony alphabet, pronounced as 'One' for clarity in all numerical transmissions, including headings, frequencies, and flight levels.
Where can I learn this term for free?
Termify is a 100% free professional English app that teaches One 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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