NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Electronic vs non-electronic
From: Rodney Myrvaagnes
Date: 1999 Oct 03, 22:14 EDT
From: Rodney Myrvaagnes
Date: 1999 Oct 03, 22:14 EDT
I don't think you answered his question. If the island, reef, etc. is charted wrong, celestial will not find it correctly, except by accident.. Datum discrepancies the same. Ellipsoid, same. GPS system errors are not significant in this context. 100 meters is closer than you are likely to get with celestial anyway. If you are close enough to anything that gps discrepancies would matter, on a chart that is not corected to a stated and known datum, you are piloting on your own. Celestial is irrelevant in such a situation. On Sun, 3 Oct 1999 19:24:48 -0400, Craig wrote: > >There are several problems associated with making GPS positions jibe with charted positions, including: > >-??GPS system errors >-??datum errors >-??charted position errors >- elipsoid (theoretical sphere on which GPS is based) vs. geoid (actual surface of the earth) differences > >etc Rodney Myrvaagnes J36 Gjo/a Associate Editor Electronic Products 20+ years without a Car, a TV, or a website
