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Geology /Acronyms - Magnetic Compass Errors And Limitations - DVMONA

Acronyms - Magnetic Compass Errors And Limitations - DVMONA

Geology6 CardsCreated about 1 month ago

This deck covers the key errors and limitations associated with magnetic compasses, summarized using the acronym DVMONA.

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D

Deviation- internal electronics affect magnetic compass
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Key Terms

Term
Definition
D
Deviation- internal electronics affect magnetic compass
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V
Variation (earth magnetic field)
M
Magnetic dip- compass pointer dips when close to north and south poles
O
Oscillation - combination of all other errors- causes card to swing back and forth
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N
North south turn errors - unos undershoot north overshoot south
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A
Acceleration errors - going east or west heading accelerate turns compass north and decelerate turns compass south
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Acronyms - Magnetic Compass Errors And Limitations - DVMONA
TermDefinition
D
Deviation- internal electronics affect magnetic compass
V
Variation (earth magnetic field)
M
Magnetic dip- compass pointer dips when close to north and south poles
O
Oscillation - combination of all other errors- causes card to swing back and forth
N
North south turn errors - unos undershoot north overshoot south
A
Acceleration errors - going east or west heading accelerate turns compass north and decelerate turns compass south