NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: The mathematics of tacking downwind
From: Bob Goethe
Date: 2016 Jul 29, 07:08 -0700
From: Bob Goethe
Date: 2016 Jul 29, 07:08 -0700
>I like the scales on your sliderule. Your tan scales ...make it very convienent to use the Bygrave procedure which produces more accurate results with a slide rule than the sine-cosine procedure.<<
Thanks for your affirmation on this, Gary. It was your encouragement & help with Bygrave - along with the contributions of others on this list - that convinced me that if one is going to do sight reduction with a stick-style slide rule , then the Bygrave equations were the most suitable ones to use. Having come to that conclusion, I attempted to optimize the rule's design for those equations.
Bob
