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    Re: Attempting to decipher a "time sight"
    From: Ed Popko
    Date: 2016 May 31, 09:12 -0700

    Frank,

    In reading and runcomputing Hart's sight data with tables and calculator, there is always the stumbling point of how ship's time was recorded in th 19th c.  Getting t and half-sums seem straight forward but the final application of this angle (converted to time) and finally LAT is always hit or miss.

    For example, was 'high noon' ship's time 12:00 or 00:00 start of next day. I can usually recreate their Time Sight calculations but I typically have to cycle through a few guesses as to how ship's time was kept.

    What were the practices during the 19th C and what are the tip offs when you look at old nav scribbles?

    Ed Popko 

       
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