compass deviation: meaning, definition, pronunciation and examples
lowtechnical
Quick answer
What does “compass deviation” mean?
The error or difference between the direction indicated by a magnetic compass and true magnetic north, caused by local magnetic influences.
Audio
Pronunciation
Definition
Meaning and Definition
The error or difference between the direction indicated by a magnetic compass and true magnetic north, caused by local magnetic influences.
In extended use, it can refer to a deviation from an intended moral or intellectual direction, or a systematic error in any measurement system.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling remains consistent ('compass', 'deviation'). The concept is identical in both navigational and aeronautical contexts.
Connotations
Purely technical; carries no additional cultural or linguistic connotations in either variant.
Frequency
Equally low frequency in both UK and US English, used almost exclusively in aviation, marine navigation, and surveying contexts.
Grammar
How to Use “compass deviation” in a Sentence
The [noun: aircraft/ship] has a compass deviation of [number] degrees.[Verb: Calculate/Correct for] the compass deviation before plotting the course.Vocabulary
Collocations
Examples
Examples of “compass deviation” in a Sentence
adjective
British English
- The compass-deviation chart was updated after installing new electronics.
American English
- The compass deviation error was significant near the steel structure.
Usage
Meaning in Context
Business
Extremely rare; potentially used metaphorically in strategic planning: 'We need to correct for the compass deviation in our market approach.'
Academic
Used in physics, geophysics, navigation, and aeronautical engineering papers.
Everyday
Virtually never used in everyday conversation.
Technical
Core term in aviation, marine navigation, cartography, and surveying. Pilots and sailors must calculate it for accurate navigation.
Vocabulary
Synonyms of “compass deviation”
Neutral
Vocabulary
Antonyms of “compass deviation”
Watch out
Common Mistakes When Using “compass deviation”
- Using 'compass deviation' to mean 'moral deviation'. While a metaphorical extension is possible, it is not the primary meaning.
- Confusing it with 'variation' (declination).
- Treating it as two separate words ('deviation of the compass') instead of the fixed compound term.
FAQ
Frequently Asked Questions
No. Magnetic declination (or variation) is the angle between true north and magnetic north, varying by location on Earth. Compass deviation is a local error caused by magnetic objects near the compass.
Primarily pilots, mariners, and surveyors. Modern aircraft and ships use gyrocompasses and GPS, but understanding magnetic compass deviation remains a fundamental skill.
Yes, but it's a technical metaphor meaning a deviation from a correct or intended moral/intellectual direction, e.g., 'The scandal was a result of his ethical compass deviation.' It is not common in everyday language.
By creating a 'deviation card' or table through a process called 'swinging the compass', which maps the error at different headings. Navigators then apply this correction to their compass reading.
The error or difference between the direction indicated by a magnetic compass and true magnetic north, caused by local magnetic influences.
Compass deviation is usually technical in register.
Compass deviation: in British English it is pronounced /ˈkʌmpəs ˌdiːvɪˈeɪʃən/, and in American English it is pronounced /ˈkʌmpəs ˌdiviˈeɪʃən/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Imagine a compass needle being PULLED AWAY (deviated) from true north by a hidden magnet. COMPASS + DEVIATION = the compass's wrong direction.
Conceptual Metaphor
A deviation from the true path or standard. Often used metaphorically for moral or intellectual straying: 'His ethical compass deviation led to scandal.'
Practice
Quiz
What is 'compass deviation' primarily caused by?