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    Re: Instumental error?
    From: Fred Hebard
    Date: 2005 Apr 20, 18:05 -0400

    On Apr 20, 2005, at 5:41 PM, Alexandre Eremenko wrote:
    
    > On an earlier remark of Fred Hebbard
    > (Tue Apr 19 2005 - 22:46:11 EDT )
    > "I would prefer that the standard deviations
    >  be given to an extra digit".
    >
    > my question is "What for?" I mean what can be a possible
    > use of this extra digit be?
    >
    
    Alex,
    
    I didn't see your question earlier, my apologies.
    
    It's just that when you get down to around 0.2' of arc, the difference
    between 0.24' and 0.16' might be informative.  The former is a fairly
    average sight, in my hands with regards to precision, while the latter
    is close to a superior sight.
    
    This is an intuitive response on my part, but I have not been
    displeased when employing it.
    
    None of this matters with regard to actual navigation, but is of
    interest in calibrating sextants, now that this service is no longer
    available.
    
    Fred
    
    
    

       
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