How to adjust for magnetic declination or variation
Over the last 40 years, has the magnetic pole, toward which all our compasses point, moved by an average of about 30 miles per year? - Quora
Earth's Magnetic North Shifting Rapidly – What's It Mean for GNSS Users? - RNTF
Magnetic declination - Wikipedia
Mag Course mismatches - IFR Magazine
GPS Protocol
Magnetic declination - Wikipedia
Plato.is / Navigation / Navigation Courses – Compass Course
Magnetic Declination
O-GPS2 – Ricoh Imaging Canada
Marine navigation courses: compass ASA RYA
World Magnetic Model (WMM) | National Centers for Environmental Information (NCEI)
What's your Magnetic Variation – the compass not you ! | altendorff.co.uk
GitHub - stevieb9/geo-compass-variation: Perl functions to calculate magnetic declination/inclination for GPS coordinates
Sailtrain: Navigation and Chartwork, Compass Variation.
WalkLakes • Do you need to worry about Magnetic Variation?
Marine navigation courses: compass ASA RYA
Magnetic declination - Wikipedia
Plato.is / Navigation / Navigation Courses – Magnetic Course
![a) World magnetic model-main field declination [42]; (b) global... | Download Scientific Diagram](https://www.researchgate.net/publication/349339507/figure/fig1/AS:991801682956288@1613475356132/a-World-magnetic-model-main-field-declination-42-b-global-distribution-of-the.jpg "a) World magnetic model-main field declination [42]; (b) global... | Download Scientific Diagram")
a) World magnetic model-main field declination [42]; (b) global... | Download Scientific Diagram
Calculate magnetic declination or variation values
How far off is true north from magnetic north? - Quora
Graphical representation of the Earth's magnetic field and of the... | Download Scientific Diagram
Earth's Magnetic North Shifting Rapidly – What's It Mean for GNSS Users? - RNTF
