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    Re: Bligh's noon by chronometer
    From: Antoine Couëtte
    Date: 2010 May 31, 06:05 -0700

    Ah ???

    I thought he would have used :

    sin H = sin Lat * sin Dec + cos Lat * cos Dec * cos T , with both Lat and Dec being (adequately) known, then it should (might?) have been straightforward (and hopefully achievable with 10log tables) to reckon Local apparent Time " T " ...

    Well ... at least we need a sufficient time between time of height observation and Apparent Noon Time - certainly and least a couple of hours here - simply because we are solving for a Cosine here, and by Apparent Noon time, T = 0 and solving it through its Cosine is not wonderfully accurate.

    Am I missing something ?

    Best Regards


    Antoine M. "Kermit" Couëtte


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