NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Ex-meridian Formula Variant
From: Greg Rudzinski
Date: 2012 Apr 17, 08:43 -0700
From: Greg Rudzinski
Date: 2012 Apr 17, 08:43 -0700
Try this variant of the ex-meridian formula for use with Bowditch vol. 2 table #29 (table #24 in latest edition)
.267 (a)(Degrees of Meridian Angle)^2
The above formula produces the same correction in minutes of arc as the standard formula.
(a)(Minutes of Time from Meridian Transit)^2 / 60
I find working directly with the meridian angle in the variant formula a bit quicker and more convenient than the standard formula.
Greg Rudzinski
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