pressure altitude: meaning, definition, pronunciation and examples
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Quick answer
What does “pressure altitude” mean?
The altitude in the standard atmosphere at which a given atmospheric pressure occurs.
Audio
Pronunciation
Definition
Meaning and Definition
The altitude in the standard atmosphere at which a given atmospheric pressure occurs.
In aviation, an altitude value corrected for non-standard atmospheric pressure, used for flight level reference and aircraft performance calculations.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage between British and American English. Both follow the same international aviation standards.
Connotations
Technical, precise, safety-critical.
Frequency
Equally low frequency in both dialects, confined to specialist fields.
Grammar
How to Use “pressure altitude” in a Sentence
The pilot adjusted the altimeter for the local pressure altitude.Pressure altitude is a critical parameter for takeoff performance.Vocabulary
Collocations
Examples
Examples of “pressure altitude” in a Sentence
adjective
British English
- The pressure-altitude correction was applied.
American English
- The pressure-altitude setting was crucial.
Usage
Meaning in Context
Business
Rarely used, except in aviation business contexts discussing flight operations or aircraft performance.
Academic
Used in meteorology, aeronautical engineering, and physics courses dealing with atmospheric science.
Everyday
Virtually never used in everyday conversation.
Technical
Core term in aviation for flight planning, instrument setting, and performance calculation. Also used in meteorology.
Vocabulary
Synonyms of “pressure altitude”
Strong
Neutral
Weak
Vocabulary
Antonyms of “pressure altitude”
Watch out
Common Mistakes When Using “pressure altitude”
- Confusing it with 'density altitude' (which also considers temperature).
- Using it interchangeably with 'indicated altitude'.
- Omitting the word 'pressure' and just saying 'altitude', which is ambiguous.
FAQ
Frequently Asked Questions
No. GPS shows geometric (true) altitude above sea level. Pressure altitude is a theoretical altitude based on air pressure relative to a standard atmosphere.
It ensures all aircraft are using a common reference for vertical separation, which is critical for safety. It is also essential for accurate aircraft performance calculations.
By setting an altimeter to the standard pressure setting (1013.25 hPa or 29.92 inHg) and reading the indicated altitude.
Pressure altitude corrects for pressure only. Density altitude corrects for both pressure AND temperature, giving a measure of air density which directly affects aircraft engine and wing performance.
The altitude in the standard atmosphere at which a given atmospheric pressure occurs.
Pressure altitude is usually technical in register.
Pressure altitude: in British English it is pronounced /ˈprɛʃə ˈæltɪtjuːd/, and in American English it is pronounced /ˈprɛʃər ˈæltɪtuːd/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Flying on the pressure altitude”
Learning
Memory Aids
Mnemonic
Think of it as the 'pressure-corrected' altitude. Your altimeter shows a number, but pressure altitude is what it *would* show if the air pressure were at the standard sea-level value.
Conceptual Metaphor
A standardized ruler for the sky: it translates the variable 'air pressure' into a fixed 'altitude' number on a common scale that all pilots use.
Practice
Quiz
What does 'pressure altitude' primarily correct for?