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Flight Phase

Nombre de Mach

The ratio of the true airspeed of an aircraft to the speed of sound under the same atmospheric conditions. Used in ATC for speed assignments and reporting in high-speed flight.

Quick answer: The ratio of the true airspeed of an aircraft to the speed of sound under the same atmospheric conditions. Used in ATC for speed assignments and reporting in high-speed flight.

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Quick answer

The ratio of the true airspeed of an aircraft to the speed of sound under the same atmospheric conditions. Used in ATC for speed assignments and reporting in high-speed flight.

Why it matters

Nombre de Mach matters because it supports clear communication in Flight Phase 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 Nombre de Mach?

In this glossary, Nombre de Mach refers to: The ratio of the true airspeed of an aircraft to the speed of sound under the same atmospheric conditions. Used in ATC for speed assignments and reporting in high-speed flight.

How is Nombre de Mach used in aviation?

In aviation communication, this term appears in contexts such as: "Maintenez Mach zéro huit zéro ou plus, informez si impossible à cause de la turbulence ou des limitations."

Why does Nombre de Mach matter in aviation?

Nombre de Mach matters because it supports clear communication in Flight Phase 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 Nombre de Mach?

Nombre de Mach is mainly used by Pilots, Air Traffic Controllers, and Cabin Crew.

What category does Nombre de Mach belong to?

In this glossary, Nombre de Mach is grouped under Flight Phase. 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 ratio of the true airspeed of an aircraft to the speed of sound under the same atmospheric conditions. Used in ATC for speed assignments and reporting in high-speed flight.

Operational example

Maintain Mach decimal eight zero or greater, advise if unable due to turbulence or performance limitations.

Localized term

Nombre de Mach

Localized example

Maintenez Mach zéro huit zéro ou plus, informez si impossible à cause de la turbulence ou des limitations.

Definition language

English reference definition

Source

ICAO Doc 9432, FAA PCG

Category

Flight Phase

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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