NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Math behind horizontal sextant angles
From: John Simmonds
Date: 1997 Mar 04, 06:33 EST
From: John Simmonds
Date: 1997 Mar 04, 06:33 EST
On Mon, 3 Mar 1997 12:11:22 -0800, Geoff Kuenning wrote: [snip] >Can anybody point me to a reference work where I could look up a >proof or derivation? (Please don't say "the old Bowditch" because I >don't have one, and you'll make me kick myself for not buying it >before they cut the size in half.) Geoff, Basically, Bowditch is the only reference I can name off the top of my head re the math for calculating the position of the centre of a COP from hrz sxt angles, but the formula is very basic .... L = S / 2 / SIN T where T is hrz angle S is distance between marks L is radius of COP passing through both marks Hope this helps, John ===================================== He who has never been lost is no navigator =====================================