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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: Greg Rudzinski
Date: 2014 Nov 12, 19:27 -0800
From: Greg Rudzinski
Date: 2014 Nov 12, 19:27 -0800
Hanno,
Highlighting every other line horizontally might be worth a look.
G
From: Hanno Ix
Date: 2014 Nov 12, 19:09 -0800
Francis,
thank you for your comparisons.
I think longhand sight reductions will probably never pass the Chichester test but would love to be proved wrong. As I see it, the real advantage of a minimized longhand sight reduction method is that it does not depend on a mechanical device that can, and probably will, fail. Even a ripped and wrinkled haversine table however will do the job and do so in short order.
It seems you like the 2 arcmin format. You realize of course the same trick works for all trig functions. In the attachment there is such a table for sin() and cos(). It is actually older than the haversine table and was certainly not optimized for size of fonts. If you like I will implement the changes to the typography as suggested by Greg for the haversine table. But before I embark on this let me know if you - and Greg, you, too! - if there are other suggestions you might have.
