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    Re: CelNav without sextants
    From: Alexandre Eremenko
    Date: 2004 Nov 2, 14:43 -0500

    Dear Doug,
    Yes, of course there are many ways to navigate.
    Dead reckoning, for example, is a good and well;
    tested method.
    
    My question was much more narrow:
    To what extent can you do CELNAV (Celestial Navigation)
    without a sextant?
    
    And I did not mean variuous instruments RELPACING sextant,
    like "latitude hooks, staffs, astrolabia etc."
    
    So probably it was better to say: "without measuring altitudes".
    That is by TIMING the events with a correct GMT clock.
    
    By reasonable precision I mean precision comparable with
    what we normally do with our sextants. Few nautical miles in position.
    
    In other words, I was proposing the following imaginary
    experiment: suppose your accidentally dropped your sextant in water:-)
    But your watch (and a simple radio to check it)
    and the
    almanach remain.
    How well can you do with that?
    
    Alex.
    
    On Tue, 2 Nov 2004, Royer, Doug wrote:
    
    > Define what you mean by "accuracy".
    
    
    

       
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