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    Variation and Amplitude
    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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