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    Re: Artificial horizon
    From: Bill B
    Date: 2005 Feb 21, 18:33 -0500

    > For an artificial horizon, there seems no reason to ask for a reflecting
    > surface bigger than, say, 3 inches diameter, which should occupy the visual
    > field of a sextant at a convenient distance.
    
    True if the body's elevation is high.  If low, the lip of the vessel may get
    in the way, so fluid would have to be topped off.  A larger vessel allows a
    greater range of elevations without having the fluid level "too" high.  This
    might not matter for water, but transporting oils etc...
    
    Bill
    
    
    

       
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