A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Tony Oz
Date: 2017 Feb 2, 01:50 -0800
Robin, thank you very much for your help!
Hc = cos-1( r cos(Dec) )
I'll try to re-do all my homework with this knowledge. As I understand my Casio, the r value is stored in the X register - easy to use in arccos() function.
Huge thanks again!