NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Variation and Amplitude
From: Guy Schwartz
Date: 2007 Jan 7, 17:08 -0800
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From: Guy Schwartz
Date: 2007 Jan 7, 17:08 -0800
In chapter 11 of Tom Cunliffe's Celestial Navigation book, he talks about
Amplitude tables. He says " Every proprietary nautical almanac should have
a page devoted to tables know as amplitude tables.
Checking my 2007 and 2006 Nautical Almanac - Commercial edition, I did not
see anything about amplitude tables. Am I missing it
or is it not there?
On to Variation. How was it discovered? My guess is that navigators would
take a bearing on the setting/rising sun and their almanacs
had the amplitude tables and determined something was off? Or am I off
base.
Thanks to Alexandre for Atmospheric refraction : a history, interesting
stuff.
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