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    Re: Sextant certificates
    From: Fred Hebard
    Date: 2006 Feb 2, 09:10 -0500

    Is this plus or minus 20" or plus or minus 10"?
    
    
    On Feb 2, 2006, at 8:55 AM, Alexandre E Eremenko wrote:
    
    > Ken,
    > Thank you for reminding us this number 20" approx 0.3'.
    > It is true, within this margin, the two certificates I obtained
    > last summer agree: in the sequence of numbers produced by Freiberger,
    > none is greater than 20".
    >
    > On the other hand, for the lunars (which is the primary use of my
    > sextant)
    > unknown 0.3' arc non-uniformity is too bad.
    > So "all practical purposes" by this definition do not include
    > lunars:-)
    >
    >
    > A
    >
    > On Wed, 1 Feb 2006, Ken Gebhart wrote:
    >
    >> Just for the record, I did state what the phrase " the error is
    >> negligeable
    >> for practical purposes" meant. That is, less than 20 sec error, by
    >> German HO
    >> dictate.
    
    
    

       
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