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3_2 The Compass
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In what parts of the Earth are magnetic compasses least accurate due to the shifting magnetic North Pole? - Quora
Magnetic Declination
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Explainer: what happens when magnetic north and true north align?
MAGNETIC NORTH
The position of the Magnetic North Pole and its possible influence on the Orientation of Racing Pigeons.
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Using a compass
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United Scientific CPL090 Large magnetic compass, 90mm diameter
In what parts of the Earth are magnetic compasses least accurate due to the shifting magnetic North Pole? - Quora
