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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Were Short methods really Short?
From: John D. Howard
Date: 2016 Aug 3, 09:43 -0700
From: John D. Howard
Date: 2016 Aug 3, 09:43 -0700
David,
My question has been " How were the Haversign methods better or faster the the straight, Law of Cosine formula.?"
Look at the beautiful Table of Log sin & cosine and the work sheet that Greg Rudzinski developed. In the archive on Oct 27, 2015 called Ageton-Classic SR Table PDF. It does not use Ageton's method of dividing the nav triangle into two right trangles - it only uses Ageton's table. I think this method is as short and fast as any that Gary named , IMHO
I think the haversign methods were a holdout from the time sight formuls/methods to get LAT. I see no advantage of using haversigns or any of the " short methods" over the straight Log sine & cosine Law of Cosine formula.
John H.
