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    Re: Self Taught Celestial
    From: Brad Morris
    Date: 2013 Feb 27, 23:59 -0500

    Hi Paul

    Is Lake Michigan frozen over at time of year?  If so, you can try an ice horizon shot,  like Worsley did for Shackleton in the ice of Antarctica.  Just use the ice as you would the fresh water horizon.  Will it be a perfect horizon?  No, but often the real horizon is a fuzzy mess anyway.  It might be fun to bundle up and try! 

    Brad

    On Feb 27, 2013 9:31 PM, "Alexandre Eremenko" <eremenko@math.purdue.edu> wrote:

    Paul,
    
    > I have recently become interested in learning celestial navigation
    
    You are welcome to this community.
    
    > After some further research, I have acquired Kolbe's "Long Term Almanac
    > 2000 - 2050", Burch's "How to Use Plastic Sextants", and the iPhone apps
    > Sight Calc and Timestamp.  I've also acquired some plotting sheets, a
    > course plotter, parallel rules, and a Davis Artificial Horizon.
    
    That's a lot of equipment:-)
    All you need, besides a sextant, is a watch, pencil and paper.
    Almanac data are available online. Simple calculator helps a lot.
    
    > Along with a good watch (Casio Wave Ceptor
    > atomic), I should be self sufficient and determine my position.
    
    There were several discussions about "atomic" watches on this site.
    I mean watches
    which depend on outside signals. Short conclusion from these discussions
    I can state as follows: use ordinary Casio watch, which is independent
    of outside signals. You can check it from time to time by Internet
    or radio signals. But it is better that you check it yourself, rather then
    rely on automatic radio adjustment.
    
    > Any other suggestions are greatly appreciated.
    
    Now just take some sights and reduce them.
    Of course it is better to use a real horizon if you have one within
    driving distance. If not, use an artificial horizon in your backyard.
    (A plate with water or spent automobile oil is OK if there is no wind).
    
    Alex.
    
    
    
    
    
    
    
    

    View and reply to this message: http://fer3.com/arc/m2.aspx?i=122517

       
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