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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
MHR-1, a compendium of posts
From: Gary LaPook
Date: 2014 Mar 4, 13:33 -0800
From: Gary LaPook
Date: 2014 Mar 4, 13:33 -0800
The MHR-1 was a German adaption of the British designed Bygrave slide rule so also search under "Bygrave."
Also see: