A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Mike Freeman
Date: 2019 Dec 22, 03:22 -0800
Thanks for your reply.
I have 2 books on Celestial Navigation, Mary Blewitt and Tom Cunliffe. Fortunately they both use the same methods. Determine GHA/LHA and declination from the nautical almanac then enter AP3270 vol 1 2 or 3 and find your Z and intercept or Zn and intercept. So yes am using intercept method. Do not know of another and for the time being feel it is wise to learn 1 method at a time.
I note using AP3270 vol 1 when you plot your LOP's and decide on your fix your work is not yet done. There is the matter of precession and nutation in table 5.
I am not familiar with calculators, do not have one but found one online and tried the COS 53 and the answer is -0.918282. You get 0.6018
What have I done wrong?