A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Tony Oz
Date: 2017 Aug 31, 09:53 -0700
I'm reading the "CELESTIAL NAVIGATION IN THE GPS AGE" by John H. Karl (the ePub version).
I've noticed several definitely typos there:
(Chapter 7, Polaris with only a Sextant):
- text right under the formula 7.1b is Lat = HO- 41' cos(-13') = HO- 40'; there should be Lat = HO- 41' cos(-13°) = HO- 40'
(Chapter 7, Position without St.Hilaire):
- formula 7.5a has sin dS instead of the proper sin d2
- formula 7.5c has sin HS instead of the proper sin H2
Also I wonder why the Chapter 10, Accuracy advises to use the different corrections for the lower and upper limbs of the Sun (the -13.5' and +18.5' respectively). Yes, their sum is the very familiar 32' of the Sun's diameter, but why they are different?
Thank you in advance.