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Author Topic: NAO Concise SR - math explanation John Pinto posted May 21, 2021 05:16 AM                   Here is an excellent paper describing the math behind the NASR tables. I found this extremely helpful in understanding what you are doing when using those tables: http://fer3.com/arc/m2.aspx/Revised-Nautical-Almanac-Concise-Sight-Reduction-Tables-Bernecky-feb-2015-g30269 From: Orlando

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