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Phonetic Alphabet

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.

Quick answer: 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.

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Quick answer

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.

Why it matters

One matters because it supports clear communication in Phonetic Alphabet contexts for Pilots, Air Traffic Controllers, and Cabin Crew. It also connects to aviation training and exam language such as ICAO Level 4, ICAO Level 5, ICAO Level 6, and EASA FCL.055.

Editorial context

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Questions and answers

Questions and answers

What is One?

In this glossary, One refers to: 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.

How is One used in aviation?

In aviation communication, this term appears in contexts such as: "Contate a torre na frequência um um oito decimal um, autorizado a pousar na pista One Six Left."

Why does One matter in aviation?

One matters because it supports clear communication in Phonetic Alphabet contexts for Pilots, Air Traffic Controllers, and Cabin Crew. It also connects to aviation training and exam language such as ICAO Level 4, ICAO Level 5, ICAO Level 6, and EASA FCL.055.

Who uses One?

One is mainly used by Pilots, Air Traffic Controllers, and Cabin Crew.

What category does One belong to?

In this glossary, One is grouped under Phonetic Alphabet. Related pages in this category explain adjacent procedures, commands and operational concepts.

Where does this definition come from?

This definition is sourced from ICAO Doc 9432, FAA PCG and published by Protermify Aviation as a static aviation reference page.

Definition

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.

Operational example

Contact tower on frequency one one eight decimal one, cleared to land Runway One Six Left.

Localized term

One

Localized example

Contate a torre na frequência um um oito decimal um, autorizado a pousar na pista One Six Left.

Definition language

English reference definition

Source

ICAO Doc 9432, FAA PCG

Category

Phonetic Alphabet

Exam relevance

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

Target audience

  • Pilots
  • Air Traffic Controllers
  • Cabin Crew

Related terms

Use the related links below to continue through connected aviation terminology.

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