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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Longhand Sight Reduction
From: Francis Upchurch
Date: 2014 Nov 11, 23:35 -0800
From: Francis Upchurch
Date: 2014 Nov 11, 23:35 -0800
Many thanks Greg,
My original confusion resulted from missing Hanno's posting of Nov 5th re the Hv only formula. Now I've found it. Congratulations to Hanno for this and his 2'Hv table which I find eaiser to use than your 10' table.(I keep making mistakes with interpolation).
I have test driven your e.g. using the Doniol, and compared it to Bygrave, and other slide rules (using cos formula, not Doniol).
Please see attachments if interested.
I'll certainly put your/Hanno's Doniol (Hv) into my minimalist crash bag, but also the Otis King+sin table.
If space is not a problem, I still prefer the Bygrave, with my prototype minifuller 2cos a close second.
Keep up the good work both.
Best wishes
Francis Upchurch
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