NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: lat/lon by noon Sun
From: James N Wilson
Date: 2009 Apr 25, 15:14 -0700
--~--~---------~--~----~------------~-------~--~----~
Navigation List archive: www.fer3.com/arc
To post, email NavList@fer3.com
To , email NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---
____________________________________________________________
From: James N Wilson
Date: 2009 Apr 25, 15:14 -0700
George:
The quoted article is yet another example of ignorance of the effect of N-S
motion and declination change. Alas, the authors seem to enjoy their bliss. I
tried to offer a correction to the myth in Cruising World many years
ago, and was advised that if I had an article to submit, I should. They weren't
the least bit interested in correcting what they had printed. Hell, their
business is to sell magazines. Factual content is secondary. Many people like
the simplicity of the myth.
The Davis sextant instructions are equally guilty. At the bottom of page
11, they advise: "The time of local noon is exactly half way between the times
of the two sights," referring to the equal altitudes method.
It is a well entrenched myth.
Jim Wilson
--~--~---------~--~----~------------~-------~--~----~
Navigation List archive: www.fer3.com/arc
To post, email NavList@fer3.com
To , email NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---
____________________________________________________________
