NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Mileage of rhumb line compared to mileage of great circle
From: Andrew Nikitin
Date: 2011 Jun 4, 13:55 -0700
From: Andrew Nikitin
Date: 2011 Jun 4, 13:55 -0700
gl wrote:
> But how did you find the "true course" to start with?
That is trickier, but still not a rocket science.
tan(TC)=(lon2-lon1)/(MY(lat2)-MY(lat1))
where MY(lat) is Y coordinate in mercator projection
MY(lat)=ln(tan(45+lat/2))
nsg
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