NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: The End of Celestial Navigation??
From: Gary LaPook
Date: 2008 Jan 04, 09:43 -0800
From: Gary LaPook
Date: 2008 Jan 04, 09:43 -0800
Gary LaPook writes:
And remember the errors I found in H.O. 249, as published on the government's web site, which were also calculated with electronic computers. What other errors exist in navigational tables that haven't been discovered yet?
I recommend the Bygrave slide rule for computation of celestial data, not a single electron is harmed in the calculation.
gl
Lu Abel wrote:
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And remember the errors I found in H.O. 249, as published on the government's web site, which were also calculated with electronic computers. What other errors exist in navigational tables that haven't been discovered yet?
I recommend the Bygrave slide rule for computation of celestial data, not a single electron is harmed in the calculation.
gl
Lu Abel wrote:
Fred Hebard wrote:On Jan 2, 2008, at 2:07 PM, Lu Abel wrote:Greg R. wrote:--- frankreed@HistoricalAtlas.net wrote:What do you think he's talking about?Obviously someone who hasn't had a major electrical/electronics failure while out on the open ocean... ;-)Would that include my quartz crystal controlled watch? I truly believe in the adage that a good navigator has two or more sources of positional information available. And only a fool would go offshore with a single GPS set, even if it were integrated into the fanciest electronic charting system. But I can't figure out why the "can't trust electronics, gotta use celestial" crowd seems perfectly happy with electronic chronometers (synchronized, of course, by listening to WWV or BBC), and perhaps even reducing their sights using a calculator. Those electronics are subject to exactly the same failure modes as GPS sets.The answer leads us back to the subject: lunars. Of course you have to trust the Nautical Almanac, but.... Fred HebardWhich is generated using *electronic* computers. Darn, where are those 19th century logarithm tables when we need them!! :-P
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