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    Re: Lat/Lon by "Noon Sun" & The Noon Fix PROVE IT
    From: Gary LaPook
    Date: 2009 Apr 16, 13:14 -0700

    When I was taking many series of sights to test the accuracy of a
    mercury artificial horizon I turned on my short wave radio tuned to
    WWVH. I took sights every minute on the minute. At the commencement of
    the spoken time announcement, which starts fifteen seconds before the
    minute, I picked up the sextant and followed the sun stopping at the
    on the minute tone. I then wrote down the time and the measured
    altitude and put the sextant down to avoid fatigue. It was easy to
    take a series of twenty sights in twenty minutes using this technique.
    
    gl
    
    On Apr 16, 7:13�pm, Thomas Kleemann  wrote:
    > George Huxtable schrieb:
    >
    > > �Can a skilled observer take timed
    > > altitude readings as close as 1 minute intervals, though? Can he do so
    > > without an assistant for noting times and recording results? If not, we
    > > should be told, because it becomes a disadvantage in the procedure.
    >
    > Yes, he can.
    >
    > When I took series of observations to test if the precision of my Davies
    > Mk15 decreases under hot sunny conditions, I preset the Sextant to small
    > changes �in altitude and got observations spaced as close together as
    > about 45 to 50 seconds.
    >
    > Although it is quicker to note this obs with the time only instead of
    > time/altitude pairs, I understand it is the same with the timed obs at
    > the decreasing slope (because one already noted the altitudes when they
    > were increasing).
    >
    > Regards,
    > � � � � Thomas.
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