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    Re: Navigation Survey
    From: Dan Allen
    Date: 2001 May 25, 3:19 PM

    Navigation-L Survey
    a) Dead Reckoning
          Rhumb Line & Great Circle via calculator & computer programs
    b) Sight Reduction
        Which is your primary Sight reduction method?
          Computer Program(Name?)--------: s2k, a program of my own creation
    written in Awk & Perl
          Calculator(Name?)--------------: s2k, ported to the HP-48 series of
    c) Plotting
        How do you do your plotting?
          Computer Program(Name?)---:  fix, a program of my own creation written
    in C
    d) Navigation Manuals
        Name your main reference manual-:
           many editions of <> by Nathaniel
           my favorite is the 1966 edition
           also George Mixter's <> is very good.
        Name a manual/book that helped you the most-:
           William F. Buckley's video tape on celestial navigation and his book
           got me started many years ago; W. M. Smart's "Textbook on Spherical
    Astronomy" along with
           Lancelot Hogben's "Mathematics for the Million" really got the basic
    principles lodged in
           my head; and writing my own software for an almanac and all of the
    corrections finally
           made it all come together.
    e) Do you use the Nautical Almanac?
            Commercial-:  as a check on my own software which is designed to
    replace the Nautical Almanac
    f) What instruments do you use?
         Several sextants (C. Plath, Tamaya, Astra)
         HP-48 calculators (for calculations, almanac)
         Seiko perpetual calendar watch (highly accurate quartz crystal for
         Pentel 0.3 mm mechanical pencil (to write data)
         Clairefontaine 9.5 cm x 14 cm notebook (logbook for sights)
    Dan Hogan WA6PBY
    Catalina 27 "GACHA"
    Navigation-L List Owner

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