A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Robin Stuart
Date: 2016 Jul 26, 07:07 -0700
Not only do the number of decimal places in the constants not make sense but the use of an explicit arctangent function, in what Stan refers to as the “exact” formula, for typical small dip short angles is quite unnecessary and misleading in terms of overall accuracy. In the attached pdf I suggest where the arctangent may have come from.