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    Re: Re : The answer...
    From: Joe Shields
    Date: 1998 Sep 30, 12:22 EDT

    I think we are saying the same thing...  Unless you are saying you can
    get a longitude fix without a precise time of the mid-point of the
    highest altitude of the sun.
    I am impressed with your celestial nav. experience.  Can you describe
    your noon sight procedure?
    -- Joe
    ---Fabrice Magnan de Bornier <fmagnan{at}XXX.XXX> wrote:
    >
    > I don't get joe'spoint about noon sun shots. My understanding is
    that, as far as latitude is
    > concerned, the when is irrelevant, only the height matters and the
    slower it
    > changes the better your accuracy is.
    >
    > And although I know this is real heresy, I have crossed the Atlantic
    Ocean
    > from Newport to Saint Malo via the A?ores (or whatever you call these
    > islands in english)  on a small yacht using only noon sun shots to
    determine
    > both latitude and longitude, and managed to land securely (the
    accuracy on
    > longitude was lousy, but still good enough to know when you have to be
    > careful). So I think the method is great and, yes, very simple (but
    maybe, in these GPS days, simplicity is not anymore the best reason
    for using astronomical navigation).
    >
    > Regards,
    >
    >
    > Fabrice Magnan de Bornier
    > Netincelle - 6 chemin de l'Or?e - 77920   Samois sur Seine - France
    > Tel : 01 64 24 67 93
    > Fax : 01 64 24 82 80
    > http://www.netincelle.com/
    >
    <HR>
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    <META content=text/html;charset=iso-8859-1 http-equiv=Content-Type>
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    <DIV>I don't get joe'spoint about noon sun shots. My understanding is
    that, as
    far as latitude isconcerned, the when is irrelevant, only the
    height matters
    and the slower itchanges the better your accuracy is.And
    although I
    know this is real heresy, I have crossed the Atlantic Oceanfrom
    Newport to
    Saint Malo via the A?ores (or whatever you call theseislands in
    english)? on a small yacht using only noon sun shots to
    determineboth
    latitude and longitude, and managed to land securely (the accuracy
    onlongitude was lousy, but still good enough to know when you have
    to
    becareful). So I think the method is great and, yes, very simple
    (but maybe,
    in these GPS days, simplicity is not anymore the best reason for using
    astronomical navigation).</DIV>
    <DIV>?</DIV>
    <DIV>Regards,</DIV>
    <DIV>?</DIV>
    <DIV><FONT color=#000000 size=2>Fabrice Magnan de
    BornierNetincelle - 6
    chemin de l'Or?e - 77920?? Samois sur Seine - FranceTel :
    01 64 24 67 93Fax : 01 64 24 82 80<A
    
    href="http://web.archive.org/web/20040422095153/http://www.netincelle.com/">http://www.netincelle.com/</FONT></DIV></BODY></HTML>
    
    
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