Compass rose, magnetic variation

4° 15' W 2009 (8' E) on the Magnetic North arrow means:
Magnetic Variation 4° 15' W in 2009
annual change 8' E
Hence, in 2011 this variation is estimated to be 3° 59' (almost 4° West), for 2020 2° 47' W, and for 2025 the estimate is 2° 07' W.

Magnetic variation found in the nautical chart's compass rose

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