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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sight tube for low angle artificial horizon sights
From: Bill B
Date: 2014 Mar 17, 13:56 -0400
From: Bill B
Date: 2014 Mar 17, 13:56 -0400
On 3/17/2014 10:46 AM, Randall Morrow wrote: > The altitudes are too low for the almanac refraction tables so the USNO > refraction figures are used. The NA refraction tables go down to upper limb 0d over the visible horizon. How much lower can you see the Sun :-)
