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    Re: Variation of compass
    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
    
    
    

       
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