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Messages - Terry

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New Member Introductions / Change in the Earth's magnetic position.
« on: February 03, 2017, 11:44:02 AM »
Recently I read that the Earth's magnetic position had moved, thus making all the data on OS maps obsolete. I have been trying to understand 'magnetic declination'. Where I live, just North of Dartmoor, the 'Grid Magnetic Angle Calculator' informs me that magnetic North is now 0 degrees 25' west. As I understand it there are 60' to a degree, thus making this change fairly insignificant, is that assumption correct?

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