NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Quick & Easy: Lat/Lon by Noon Sun
From: Frank Reed CT
Date: 2006 Nov 16, 02:17 EST
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From: Frank Reed CT
Date: 2006 Nov 16, 02:17 EST
Henry H, you wrote:
"Some time ago, I posted examples of Longitude determination by equal
altitudes of the Sun at and about Local Apparent Noon, which were done on a sea
horizon and generally replicated conditions at sea, except for rolling/pitching
and sea spray. These postings were generally ignored at the time, but should be
available in the archives."
I remember one post in particular that you wrote in August of 2004.
Indeed it was ignored at the time, but I don't think you should take it as
meaning that it was ignored for content. There is an "August" effect on this
list. At least one month in (northern hemisphere) summer is extremely quiet on
the list, and quite a few posts pass without any comment at all. I
imagine list members (most of whom are in the northern hemisphere --no offense
to those with opposite seasons) are enjoying the nice weather and taking
advantage of every opportunity to get out on the water. That's the August
effect.
Here's a link to Henry Halboth's rather detailed "noon" observations for
latitude and longitude:
Any thoughts?
I'll just mention that I prefer to graph a series of sights around noon to get a
better timing of Local Apparent Noon. This is merely a wrinkle in the
method of equal altitudes.
-FER
42.0N 87.7W, or 41.4N 72.1W.
www.HistoricalAtlas.com/lunars
42.0N 87.7W, or 41.4N 72.1W.
www.HistoricalAtlas.com/lunars
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