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    Re: Navy MK 5 Octant Using Natural Horizon
    From: Alexandre Eremenko
    Date: 2012 May 1, 02:15 -0400

    Greg,
    Thanks for your explanation.
    I did not realize that this was the bubble octant:-)
    
    (But these are excellent results for a bubble octant!
    I have never heard of the 0.1' accuracy obtained with a bubble octant,
    even if this is an average of 30)
    
    > There is no way to get results like I did with a
    > bubble horizon even on my luckiest day ;-)
    
    I thought tat there is no way to obtain the results you are talking
    about with a bubble octant at all:-)
    But I have never tried my bubble octant with the real
    horizon.
    
    > I was happy to get near marine sextant performance
    > which means that this particular octant with horizon
    > prism is good enough to substitute for a marine sextant
    > aboard ship or small craft.
    
    I don't see a reason to substitute a normal sextant with a bubble octant
    if the real horizon is available, except that a bubble octant is usually
    cheaper. But the performance of your bubble octant seems to be quite
    exceptional.
    
    Alex.
    
    
    
    

       
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