NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2012 Jun 26, 09:05 -0700
Yesterday I had the Sun and Moon right were I wanted them for a fix and ex-meridian of the Moon. The linked work sheet shows the summing and plot. A 0.2' discrepancy was noticed between the Nautical Almanac and the USNO parallax correction. I prefer the USNO formate (see pic 164 and pic 173) which has each correction listed separately to the Nautical Almanac which combines parallax, refraction, and semi diameter in a confusing set of tables that has instructions in fine print on an adjacent page. There is room for improvement here.
Greg Rudzinski
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