magnetic variations

Nghĩa (Tiếng Anh)

plural of magnetic variation

magnetic variation

1. (countable, uncountable) In navigation, at a given place and time, the horizontal angle between the true north and magnetic north measured east or west according to whether magnetic north lies east or west of true north.
2. (countable, uncountable) In cartography, the annual change in direction of the horizontal component of the Earth’s magnetic field.

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magnetic declination