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I tried a small plate of water in my backyard and it worked fine if it
wasn't for the wind. The Davis Artificial Horizon has a cover that will
protect the water surface from the wind. It should work better.

Sam
----- Original Message -----
From  "Yves Arrouye" 
To: 
Sent: Monday, April 23, 2001 9:34 PM
Subject: Re: Astra IIIB


> > The practice bubble horizon is difficult to use. There is no
> > magnification.
> > The slit aperture makes me see double of the reference line
> > in the sight.
> > Combine that with trying to hold the sextant steady so the bubble is
> > centered while adjusting the sight ... it can be frustrating.
>
> I know, I tried it. What's very frustrating is how any small movement
makes
> the bubble go away. But then, I didn't seem to have much success with a
pan
> of water in my garden either. Maybe oil would be better? Anyway, the
bubble
> horizon is on order, and I'll see what my first sights will be. Not good I
> imagine...
>
> YA
>

   

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