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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Variation of compass
From: Dave Weilacher
Date: 2002 Oct 2, 14:04 -0700
From: Dave Weilacher
Date: 2002 Oct 2, 14:04 -0700
One thing I attempted was to compute compass variation by assuming a GP for the mag north pole of 82N x 108W then doing a sight reduction to obtain azimuth (Zn). Ended up deciding there were two problems with this; both biggies. First, it ignores the earths own magnetic anomolies. No help for this. Second, it gives me an initial great circle bearing when I suspect what I'm really after is a rhumbline bearing. BTW, it yielded a reasonable answer from Florida, but was whacko for Bermuda
