NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Herman Dekker
Date: 2015 Sep 5, 13:26 -0700
Can some explain.
What are the rules for using the diagram determing Azimuth, when using the HavSinDoniol method.
I:The diagramscales go to 90°. So what to do for LHA:
0-90° use the scale
91-180° ?
181-270° ?
271-360° ?
II:Then when found Z this gives value between 0 and 90°.
Some times added to 180° sometimes distrated from 180°
I have read the rule Z E/W as name of t ????? t= LHA and is between 0 and 360° so, I do not see + or - on this.
Z N/S by observation, but what is to do, with one example from a textbook. Is there a rule for?
I think myself on something as: Declination Object > Latitude Observer = N 0° Declination Object < Latitude Observer = S 180°
or is that wrong?
I like written rules on the diagram, because I can difficult remember them If needed.
regards,
Herman Dekker
