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    Re: Time Sight usage
    From: Antoine Couëtte
    Date: 2013 Jan 14, 20:42 -0800

    Hello Henry,


    Thank you for this opportunity to crunch numbers.

    The "guessplanations" from Robert Bernecky seem excellent, what do you think Henry ? Given your knowledge of the environment - the mosquitoes - on that day in Feb 1949, would you be in a position to fully confirm his findings ?

    Anyway, for me Robert you are now a new Sherlock Holmes added to our NavList. :-)

    So, the LH top (unknown height) was Sextant observed at 1d56' [probably] above the apparent horizon then. Given the likely environmental unknowns, especially as regards DIP and DIPSHORT, this might account for some definite uncertainty in its actual Distance calculation, and accordingly in the computed offsets (N0.7' and W0.7').

    Nonetheless, as we can reconstruct it to-day, - and in spite of the unavoidable offset uncertainties - the LH position was fully confirmed and its position accuracy was improved by a factor 2 (0.4 NM vs. 0.8 NM in the 1932 Bowditch), which certainly is a quite solid achievement for a limited number of Sextant observations under this environment. In addition to the Navigator qualities, this Sextant was definitely an excellent one, and which brand if I may ask ?

    Best Friendly regards to all


    Antoine
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