NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Lindy Line
From: Walter Guinon
Date: 2002 Dec 6, 06:39 -0800
From: Walter Guinon
Date: 2002 Dec 6, 06:39 -0800
George H has the right idea, Bowditch gives his approach as an approximation to the shortest distance. Howerver the shortest path, subject to a maximum Latitude, is given by a GC thru the departure point that is tangent to the limiting parallel, then along the parallel to another GC thru the destination point and which is also tangent to the limiting parallel. When this approach is studied on a gnomic chart the extension to arbitraty curves which exclude certain areas (e.g. land) seems clear. __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com
