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    Re: Bubble/aircraft sextant with horizon view
    From: Hewitt Schlereth
    Date: 2014 Feb 28, 11:20 -0800
    Frank, that would be the Navy Mark 5.

    I bought one from Celestaire circa 1975 for $75 (at the time my C. Plath cost me $395). I liked it for two reasons: the averager and because it was comfortable to use - You hug it. That way your arms are braced on your chest and the whole position is steadier than the arms-out one of a traditional sextant. Even wrote an article about it "Celestial Navigation on the Cheap." :-)

    Hewitt

    On Feb 28, 2014, at 10:36 AM, "Frank Reed" <FrankReed{at}HistoricalAtlas.com> wrote:


    I vaguely remember descriptions of a sextant model (or models?) primarily intended for aircraft use, and built with a bubble like an aircraft sextant, which also has a direct horizon light path so that altitudes can be observed referencing the sea horizon just like a standard nautical sextant. What instrument would that be? And are these common enough? Or rare and expensive?

    -FER
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