A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Gary LaPook
Date: 2013 Apr 30, 14:18 -0700
|Mr. van Asten, this is what you posted on TIGHAR:|
In his current post he writes:
"air navigator A.W.Brown (pilot J.Alcock) , June 1919 , checked position at sunrise : ' At sunrise Brown was prepared to check his position by observing the azimuth of the sun ... At five in the morning he obtained a sun line with his artificial horizon and as of 0720 worked out a fix '"
I pointed out his dishonesty:
"This is a direct quote from page 70 of Precision Astrolabe. Note van Asten's premeditated and calculated use of the ellipsis.
Putting back in the words that van Asten dishonestly left out, the full quote reads:
" At sunrise Brown was prepared to check his position by observing the azimuth of the sun, a technique which we are now beginning to suspect could have been employed by the Norsemen. The 'indefiniteness of dawn', however, precluded this possibility. At five in the morning he obtained a sun line with his artificial horizon and as of 0720 worked out a fix ."
The "indefiniteness of dawn" precluded any type of observation of the sun by Brown at sunrise. The words that he left out completely contradict van Asten's claim. Later, well after sunrise, Brown used a bubble attachment to his marine sextant to take a normal measurement of the sun's altitude. The "indefiniteness of dawn" obviously applied to Brown since it would make no sense to claim that every time the Norsemen tried to measure the azimuth of the sun (doing this a thousand years ago) that they were prevented by "indefiniteness of dawn" especially since this method is only a theory and doesn't have any actual proof behind it.
So, van Asten, you don't see any missing words for your misleading quote?
Here is a link to my post:
--- On Tue, 4/30/13, h.a.c. van Asten <hac.vanasten---.com> wrote: