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- The Location’s Magnetic Declination
- The angle between True North and Magnetic North, also known as Magnetic Variation.
- Enter the Magnetic Declination for this location. Select West or East for the entry, ignore West or East for a zero declination.
- If you do not know the declination, leave the box blank or enter a “?”, DO NOT enter zero.
- See the manual for suggestions on finding the Magnetic Declination for a new location.