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    Re: Latitude by noon Sun sight
    From: Alexandre Eremenko
    Date: 2019 Dec 3, 18:37 +0000

    It is not very critical,
    And exactly for this reason, you can determine your latitude
    by noon Sun without a chronometer (which was a common practice before chronometers).
    You cannot tell exactly how much error will every second of time introduce,
    because the answer depends on your latitude, Sun's declination, and how far is your second from the noon.
    But one can make a simple table for this error.
    With the technique used in practice (you start few minutes before the noon, 
    and just rotate your drum until
    the latitude increases), and take the reading when it starts decreasing, the 
    error is negligible, so you do not really need this table.
    But I can reproduce this simple table (from a book) if there is need.
    From: NavList@fer3.com [NavList@fer3.com] on behalf of Mike Freeman [NoReply_Freeman@fer3.com]
    Sent: Tuesday, December 3, 2019 12:46 PM
    To: eremenko@math.purdue.edu
    Subject: [NavList] Latitude by noon Sun sight
    How critical is it to nail the exact time of LAN?. This must have been 
    considered thousands of times. For every minute of time out what would be the 
    error. I guess not much?

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