NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Magnetic variation
From: Greg Rudzinski
Date: 2011 Apr 28, 12:04 -0700
From: Greg Rudzinski
Date: 2011 Apr 28, 12:04 -0700
Lars,
As Marcel suggested the NOAA online variation calculator works good from 1900 so to get 1897 just work backwards from 1900 using the annual rate of change in reverse. In the year 1900 for 80N 33E the variation is 3* 37' E with an annual change of 3' E. Going back to 1897 apply the change in a west direction and get 3* 28' E for year 1897.
See link for 1 Jan. 1900
Greg Rudzinski
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