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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

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    Re: Welcome Aboard! New and returning...
    From: Lu Abel
    Date: 2011 Feb 7, 07:54 -0800
    I have to disagree.  In many cases, ice is broken into plates which are heaved on atop another by natural forces, so I don't believe that an iced-over body of water can be reliably used for a horizon.

    I also disagree that if one were lucky enough to find a body of water frozen over with a perfect sheet of ice that the thickness of the ice would have to be subtracted from HE.  If one is standing on a perfect sheet of ice, what's the difference between that and standing on a perfect sheet of water?

    Welcome to the list .....

    Lu Abel


    From: "Anabasis75@aol.com" <Anabasis75@aol.com>
    To: NavList@fer3.com
    Sent: Mon, February 7, 2011 7:09:40 AM
    Subject: [NavList] Re: Welcome Aboard! New and returning...

    You can always subtract the ice thickness from your Height of eye calculation.
     
    You are lucky that your Celesticomp is still working.  I can't help you with it's built in Almanac since I haven't even seen one in 3 years.
     
    Jeremy
     
    In a message dated 2/7/2011 6:30:13 P.M. Bangladesh Standard Time, rtrowbridge@svprecipice.com writes:

    Thank you for the welcome.
    I do have a question about using the horizon on the frozen ocean. Does having four feet of ice over the surface of the ocean affect the accuracy of a shot?

    I also wonder if anyone knows how long the database in the Celesticomp V is good for?

    Thanks ahead of time!
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