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    Re: Vernier sextant
    From: Alexandre Eremenko
    Date: 2007 Mar 6, 21:07 -0500

    
    Well,
    
    I never tried, and I trust Robert's
    experience.
    
    I tried an ordinary sextant (SNO)
    on a small boat in Atlantic, and heavy sea,
    and I found it extremelly tricky to keep
    the Sun in the field of view.
    I could only do observations without a scope,
    and the accuracy was poor.
    
    Alex.
    
    On Tue, 6 Mar 2007, Robert Eno wrote:
    
    > Bill wrote:
    > > Do you feel one would stand a chance of keeping the bubble and object
    > > aligned on s small craft in heavy seas?
    
    > > Bill
    >
    > Robert responds:
    >
    > When pigs learn to fly.
    >
    > I have tried bubble horizons at sea on numerous occasions. Even in a
    > moderate sea, the bubble scoots around like a ferret on speed. An averager
    > won't help in this case because it will just average out a series of
    > demented observations. The averager was designed for the relatively smooth
    > platform of large aircraft. It was never intended for use at sea.
    >
    > Trust me, I have tried many times. Even on a calm sea, using a bubble
    > horizon can be tricky.
    >
    > cheers,
    >
    > Robert
    >
    >
    >
    > >
    
    
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