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Re: Sight Reduction Formula
From: Jan Kalivoda
Date: 2003 Oct 28, 13:28 +0100
From: Jan Kalivoda
Date: 2003 Oct 28, 13:28 +0100
After a delay, I should say thanks to Herbert Prinz for his pithy and instructive answer to Ralph's question. I would only add that the azimuth formula introduced by George Huxtable in this thread (tangent/cotangent formula) became the core of renowned ABC-tables for finding the azimuth from LHA, Lat and Dec ("Time azimuth" according to some editions of Bowditch.) They emerged at the end of the 19th century and remain the part of many European navigation table sets up to now. They never gained such popularity beyond the Atlantic, but they should be taken as the best azimuth tables ever published. Of course, Alt+Az inspection tables (HO 214, HO 229 etc.) and digital tools replaced them step by step, as Herbert Prinz demonstrated. Jan Kalivoda