NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: h.a.c. van Asten
Date: 2013 May 5, 16:36 -0700
When using the bubble sextant the(refracted)sun´s centre must be in the celestial horizon ; I called this "central sunset" . I used "true sunrise" to indicate that , when you observe the sun with other instruments on the local horizon , you see the (refracted) true sun at GAT , not the sun belonging to GMT watch time , since the mean sun is an imaginary object only . We evidently battled with a rocket that does not work , against an enemy that does not exist . My bad .
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