A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Antoine Couëtte
Date: 2016 Jun 19, 10:51 -0700
You wrote "But, there are equations in sources like Chavenant which let you calculate the parallax in azimuth effect without doing the 3D vector calculation."
Most of the time, the parrallax in azimuth is extremely negligible, we all agree on that, don't we ?
Still I would be interested to know whether such Chavenant equations correctly tackle the extreme case when the parallax in Azimut is equal to +/- 180 ° (see enclosed scanned drawing). What are these formulae ?
Best and Friendly Navigational Regards,