A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: What is it?
From: Marvin Sebourn
Date: 2004 Dec 13, 10:36 EST
Abney Levels, also: Geologists use them for field work, easier to use
and more accurate (my opinion, but especially so, hand-held) than the
clinometer on a Brunton Compass, for vertical angles.
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