NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
A simpler Bygrave ?
From: Hanno Ix
Date: 2010 Feb 5, 16:43 -0800
From: Hanno Ix
Date: 2010 Feb 5, 16:43 -0800
Ageton's method can be, mathematically at least, performed with a single scale, log cosec or log sec.
Therefore, it should be possible to create a version of the Bygrave that contains just a single scale of cosec or sec.
For convenience, one could add one or more cursors as convenient.
Note: The CelNav on Starpath's Emergency Navigation Card can be reduced to this method.
Just compare their N(x) Table with : n(x) = logn(cosec(x)) for x=1...89;
I can see certain mechanical advantages of a one-scale Bygrave. I am sure this has occurred to somebody else long ago, too.
Therefore I ask why, despite its seeming simplicity, such a version has never been implemented.
Regards
