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Actually it was intuitively obvious to the most casual observer; right after
I'd pressed the send button.

On Thu, 3 Oct 2002 13:25:22 -0400 Michael Wescott 
wrote:

> daveweilacher@EARTHLINK.NET said:
> > 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.
>
> Great circle is what you want, much the same as
> a fix on a radio beacon.
>
> --
>         Mike Wescott
>         Wescott_Mike@EMC.COM
>



Dave Weilacher
.US Coast Guard licensed captain
.    #889968
.ASA certified sailing and celestial
.    navigation instructor #990800
.IBM AS400 RPG contract programmer

   

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