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    Re: Self Taught Celestial
    From: Paul Fithian
    Date: 2013 Feb 28, 09:53 -0800

    Thanks for the suggestion on the USNO sight, but that is why I listed the iPhone App, Sight Calc. It does the sight reduction by inputing LHA, Lat, and Dec. It outputs Hc and Z.

    I have the Timestamp App to record immediatly the time the Hs sight was taken. But I do plan to get an accurate watch so that I don't have to depend on a working iPhone.

    It is clear to me that using either the Sight Calc App or scientific calculator method for determing Hc and Z are way easier that trying to use any of the sight reduction tables. I can use my 25 year old HP for the calculations.

    But I am committed to learning the sight reduction technique in Kolbe's book (described as, "a version of the "NAO Sight Reduction Tables" as used in the Nautical Almanac since 1989) so that Kolbe's LTA becomes the only book I need to carry on board. The other methods of sight reduction should be unnecessary, as I don't plan to carry any of them on board. Right?

    The reality of all this is that CN is a fascinating subject that I've always wanted to learn. After reading Annie Hill's "Voyaging on a Small Income" where they describe navigation by sextant, I figured I could learn about this while it is still winter instead of watching TV.
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