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Flight Phase

Numero di 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

Numero di 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 Numero di Mach?

In this glossary, Numero di 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 Numero di Mach used in aviation?

In aviation communication, this term appears in contexts such as: "Mantieni Mach zero otto zero o superiore, avvisa se impossibile per turbolenza o limiti di prestazione."

Why does Numero di Mach matter in aviation?

Numero di 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 Numero di Mach?

Numero di Mach is mainly used by Pilots, Air Traffic Controllers, and Cabin Crew.

What category does Numero di Mach belong to?

In this glossary, Numero di 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

Numero di Mach

Localized example

Mantieni Mach zero otto zero o superiore, avvisa se impossibile per turbolenza o limiti di prestazione.

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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