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Acronyms - Magnetic Compass Errors And Limitations - DVMONA
This deck covers the key errors and limitations associated with magnetic compasses, summarized using the acronym DVMONA.
D
Deviation- internal electronics affect magnetic compass
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Key Terms
Term
Definition
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
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| Term | Definition |
|---|---|
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 |