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    Byrd Sextant (or should it be "de Florez sextant")
    From: Bill Morris
    Date: 2009 May 30, 02:45 -0700

    I recently acquired and restored to working order an early aeronautical 
    sextant of the type used by Commander Richard Byrd on his claimed flight to 
    the North Pole in 1926 (see attachment). This used a linear rather than a 
    circular bubble and cannot have been very easy to use, least of all in the 
    air. For those interested in the instruments of navigation, I give some 
    historical details and an account of the instrument on my blog posted today 
    at www.sextantbook.com ,under the heading of "Aircraft Sextants".
    Luis de Florez claimed priority of invention over Byrd, but the more famous 
    name of Byrd has stuck with the instrument.
    Bill Morris
    New Zealand
    Navigation List archive: www.fer3.com/arc
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