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John:

Your book makes no mention of a correction for north-south movement or
declination change. You do note that "vessels moving rapidly north or
south . . . " cause degradation. Many experienced navigators have
expressed disbelief that moving at sailboat speeds can have a significant
effect. The error due to this in my example is seventeen miles. I have
remarked that I was lucky to have first tried the method while sailing a
southwesterly course. Otherwise, I might still be among the ignorant.

Jim Wilson

On Wed, 8 Apr 2009 20:29:33 -0700 (PDT) John Karl 
writes:
>
> With all this talk about noon-sun-sight books, why not try my
> little
> booklet called "Latitude & Longitude from the Noon Sun",  available
> from Celestaire??  This, a sextant, and a watch set to UT is all
> you
> need for basic or standby CN.
>
> John
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