NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2019 Jun 21, 07:38 -0700
Brian,
The Hanno Ix azimuth graph works with the same rules as the azimuth formula:
Arc Sin} Cos Dec Sin t / Cos Alt. = Z
Northern Hemisphere - same name : Altitude less than prime vertical - add or subtract Z from due north (000,360) for azimuth.
Altitude greater than prime vertical - add or subtract from due south(180) for azimuth.
- contrary name : add or subtract from due south (180) for azimuth.
Southern Hemisphere - same name : Altitude less than prime vertical - add or subtract from due south (180) for azimuth.
Altitude greater than prime vertical - add or subtract from due north (000,360) for azimuth.
- contrary name : add or subtract from due north (000,360) for azimuth.
Prime Vertical Formula: Arc Sin} Sin Dec / Sin Latitude = Prime Vertical Altitude . The prime vertical altitude azimuth will always be due east or west (090,270).
Greg Rudzinski
