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    Re: sextant without paper charts
    From: Nicol�s de Hilster
    Date: 2008 Nov 09, 10:16 +0100

    bruce hamilton wrote:
    >  If the sextant had continued to evolve, I think a gyroscopic base might 
    > have been a good route. I saw one somewhere.Does anyone know about those?
    Peter Ifland wrote about those in his 'Taking The Stars' (Malabar, 1998, 
    pp.115-118). The gyroscopic horizon was invented in 1886 by G.E. 
    Fleurriais of the French Navy. His book shows pictures of several 
    versions; one by Hurlimann, Ponthus & Therrode Succ. A Paris, that still 
    looks like a classic sextant, but with the gyro attached behind the 
    horizon mirror. The other is a modified bubble sextant by C. Plath (SOLD 
    gyro sextant), developed in 1939. Finally Weems System of Navigation of 
    Annapolis, Maryland made one in 1965 (no picture). The gyro's were all 
    air driven.
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