A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding
From: Bob Goethe
Date: 2015 Jul 30, 12:55 -0700
I am intrigued by the equation to correct for motion-of-observer:
ΔHo = (SΔt/60)*cos(Zn-C)
Is it feasible to calculate this using a slide rule where (Zn-C) is greater than 90°? I have never done sines/consines on a slide rule where any of the angles were larger than 90°.