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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: DR, AP, and tables (was: Silicon Beach)
From: Peter Fogg
Date: 2004 Feb 23, 10:52 +1100
From: Peter Fogg
Date: 2004 Feb 23, 10:52 +1100
----- Original Message ----- From: "George Huxtable" > No, Renee, those weren't the weaknesses I pointed out. I pointed to the > major errors, of several degrees, that could arise in the predicted > azimuths of bodies that were anywhere near East or West of the observer. > There was no mention of those errors in the book, but George Bennett, in a > posting to this list, accepted that such errors were present and has stated > that he would include a note to that effect for future purchasers of his > book. > > Because of that, and because we have given the weaknesses in Bennett's book > a good airing, I would prefer not to dwell any further on that topic, if > possible. Except, perhaps, to make it clear that the sight reduction tables and azimuth determination are separate, one doesn't affect the other. And that a number of methods for azimuth determination are offered, the possible 'error' only affects one method when azimuth is close to east or west, which could be a good time to check it against another method.