NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Brad Morris
Date: 2014 Jan 20, 19:42 -0500
I half expected the link to the 7 year old email to show. It did not. I used the fer3.com site to reply.
http://fer3.com/arc/m2.aspx/Centring-Error-Detector-FrankReed-jan-2007-g2047
Hi Frank
Here's a 7 year old post that caught my eye.
It describes a method that permits you to measure the arc error. It all makes sense to me but I'm trying to figure out how the prism is aligned to the optical path assigned to the horizon.
Would you happen to have a copy of the patent?
Alex,
you mentioned that this equipment was offered by Heath and you had the catalog / book for it. Do you have it still?
Brad
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