compass deflection
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English[edit]
Noun[edit]
compass deflection (plural compass deflections)
- The difference, expressed in degrees, between the direction a magnetic compass needle points and true or astronomical north; magnetic declination.
- Differences, expressed in degrees, between magnetic north directions and the direction a magnetic compass points, owing to local magnetic interferences; magnetic deviation.
References[edit]
- United States Bureau of Mines, Dictionary of Mining, Mineral, and Related Terms (1996).