A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Chris Caswell
Date: 2017 Dec 3, 14:25 -0800
I was reducing a sun sight I took this August using the almanac and Pub 229, and the intercept was 30 miles off. The sight was taken on a tripod using a RAF MKIXA bubble sextant, and the computer program AstroNav gave me an intercept of 0.0075'. Actual LHA was 2 ° 3.7', so of course I used the 2° page and calculated the altitude was 58° 10.1' vs. the Ho of 57° 40'. I had hoped for greater accuracy because the actual LHA was quite close to an integer - is this just the nature of the tables? It seems I have done other reductions that came closer.
Chris in VT