NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: David Fleming
Date: 2011 Dec 17, 10:11 -0800
Looking at the photo I see that the AH has leveling screws which allow one to have a large surface area without large quantities of liquid.
The assistant is hovering over the AH to get it level.
I can not tell from the photo what liquid is being used.
Wikipedia tells me summertime high temperatures in Antartica by the coast might be in the +5 to +15 degrees Centigrade. What that means at the pole is a guess but liquid mercury strikes me as not improbable.
Dave Fleming
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