NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Gary LaPook
Date: 2016 Oct 19, 00:29 -0700
See prior posts:
http://fer3.com/arc/m2.aspx/Modifications-2102D-LaPook-apr-2009-g7982
http://fer3.com/arc/m2.aspx/Modifications-2102D-LaPook-apr-2009-g7986
http://fer3.com/arc/m2.aspx/Sun-AltitudeAzimuth-2102D-LaPook-oct-2010-g14113
http://fer3.com/arc/m2.aspx/Star-finder-2102D-further-modification-LaPook-nov-2010-g14300
http://fer3.com/arc/m2.aspx/Yet-another-modified-2102D-star-finder-LaPook-jan-2013-g21846
http://fer3.com/arc/m2.aspx/Star-finder-2102D-further-modification-LaPook-nov-2010-g14311
http://fer3.com/arc/m2.aspx/Star-finder-2102D-further-modification-LaPook-nov-2010-g14314
http://www.fer3.com/arc/imgx/IMG_0148.JPG
http://www.fer3.com/arc/imgx/IMG_0151.JPG
http://www.fer3.com/arc/imgx/IMG_0153.JPG
gl
--------------------------------------------------------------------------------------
From: Frank Reed
Date: 2016 Oct 18, 13:48 -0700
Brad Morris, you wrote:
"There are many other things you can play with, like adding altitude lines for astronomical, nautical and civil twilight. So you turn it into a sunrise/sunset calculator. Of course, you have to be able to plot the sun to do that. Some versions I posted have that facility."
Yes, this is a great addition, and it's something that Gary LaPook and various others (me included) have suggested, too. Point being that there's lots of agreement that this is a good idea, worth the effort.
You do this by adding simple altitude "arcs" for -6°, -12°, -18° for civil, nautical, and astronomical twilight respectively, or just one or two of these depending on your interests.
