NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextant parallax and index error determination
From: Jim Martin
Date: 2007 Nov 21, 14:40 -0800
From: Jim Martin
Date: 2007 Nov 21, 14:40 -0800
According to Nicholls's Concise Guide,sextant parallax becomes less
than 1second of arc at a distance of 5nm.
Jim Martin.
On Nov 21, 9:42 am, Greg Rudzinski wrote:
> Question for NAVLIST- Is the sextant parallax baseline measured from
> the center of the scope to the center of the index mirror? How far
> should the visible horizon be when used as a reference for determining
> index error? Bowditch offers no explanation.
>
> Greg Rudzinski
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