Basic ATC
A phrase used by pilots to indicate they cannot comply with a specific instruction or clearance.
Quick answer: A phrase used by pilots to indicate they cannot comply with a specific instruction or clearance.
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A phrase used by pilots to indicate they cannot comply with a specific instruction or clearance.
Unable matters because it supports clear communication in Basic ATC 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.
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Questions and answers
In this glossary, Unable refers to: A phrase used by pilots to indicate they cannot comply with a specific instruction or clearance.
In aviation communication, this term appears in contexts such as: "Pilot advises: 'Unable to comply with altitude restriction, request alternative.'"
Unable matters because it supports clear communication in Basic ATC 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.
Unable is mainly used by Pilots, Air Traffic Controllers, and Cabin Crew.
In this glossary, Unable is grouped under Basic ATC. Related pages in this category explain adjacent procedures, commands and operational concepts.
This definition is sourced from ICAO Doc 9432, FAA PCG and published by Protermify Aviation as a static aviation reference page.
A phrase used by pilots to indicate they cannot comply with a specific instruction or clearance.
Pilot advises: 'Unable to comply with altitude restriction, request alternative.'
English reference definition
ICAO Doc 9432, FAA PCG
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