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    Want used plastic sextant/Book recommendations.
    From: John H Henderson
    Date: 1996 Aug 26, 14:18 EDT

    I'm new at celestial navigation and after doing some research,
    I would like to get a plastic sextant, like a Davis Mark
    15 or 25, but wanted to see if anyone had a used one they were
    willing to sell at a break from the new prices ($102/$175).
    I would also like recommendations for a good book on celestial
    navigation.  I checked "Sky and Sextant" by John Budlong out
    of the library and liked it a lot.  He uses HO 249, and then
    later has a chapter on using Ho 229 and HO 211.  There's a nice
    discussion on locating major stars, a chapter on emergency procedures,
    and a chapter on programming calculators.  He even includes a perpetual
    almanac and a complete H.O. 211 in the appendix, so if you lose all
    but this book, it'll get you by.  Unfortunately, it is no longer
    available, and I can't keep the library copy forever.  Can anybody
    recommend a good book like this on celestial navigation.  I have a
    Celestaire catalog with a listing of what I assume are most of the
    currently available books on the subject.  I would like something with
    some equations in it.  I'm not afraid of sines and cosines.
    I don't know if it is well known, but I played with a calculator and
    the HO 211 tables last night and figured out that
    A = -100,000 log10(sin(R)) and B = -100,000 log10(cos(R)) where R
    is the angle, so I will write a program to generate my own "211".
    C  John H. Henderson                        E-mail: johnh@XXX.XXX
    C  Dept. of Electrical Engineering   Finger: johnh@XXX.XXX
    C  Auburn University       WWWeb: http://www.eng.auburn.edu/users/johnh/
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