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Phonetic Alphabet

Deux

The ICAO/FAA radiotelephony spelling for the numeral '2'. Used to communicate numbers, headings, altitudes, flight levels, and runways unambiguously in ATC transmissions.

Quick answer: The ICAO/FAA radiotelephony spelling for the numeral '2'. Used to communicate numbers, headings, altitudes, flight levels, and runways unambiguously in ATC transmissions.

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Quick answer

The ICAO/FAA radiotelephony spelling for the numeral '2'. Used to communicate numbers, headings, altitudes, flight levels, and runways unambiguously in ATC transmissions.

Why it matters

Deux 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 Deux?

In this glossary, Deux refers to: The ICAO/FAA radiotelephony spelling for the numeral '2'. Used to communicate numbers, headings, altitudes, flight levels, and runways unambiguously in ATC transmissions.

How is Deux used in aviation?

In aviation communication, this term appears in contexts such as: "Montez et maintenez le niveau de vol deux cinq zéro, signalez lorsque atteint."

Why does Deux matter in aviation?

Deux 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 Deux?

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

What category does Deux belong to?

In this glossary, Deux 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 ICAO/FAA radiotelephony spelling for the numeral '2'. Used to communicate numbers, headings, altitudes, flight levels, and runways unambiguously in ATC transmissions.

Operational example

Climb and maintain flight level two five zero, report reaching.

Localized term

Deux

Localized example

Montez et maintenez le niveau de vol deux cinq zéro, signalez lorsque atteint.

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

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