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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Accuracy of Bygrave
From: Gary LaPook
Date: 2009 Jul 05, 22:49 -0700
From: Gary LaPook
Date: 2009 Jul 05, 22:49 -0700
My experience with the accuracy of the models I made is that it is consistently within two minutes of arc and most often within one minute. This is consistent with what others have written about the instrument, including Bowditch, article 2121. So the error doesn't exceed 2 nautical miles, 2.3 sm. There are some rare special cases that require a slight change in procedure but when the special procedures are followed the accuracy of the computed altitude remains within 2 minutes of arc. See instructions at: http://www.fer3.com/arc/img/108719.revised%20form%206-18-09.pdf Regarding accuracy see the attached documents and: http://www.fer3.com/arc/img/106329.bygrave%20pages%20from%20naca-report-198.pdf http://fer3.com/arc/m2.aspx?i=107947&y=200904 http://www.fer3.com/arc/img/106329.bygrave%20manual.pdf http://www.fer3.com/arc/img/106329.imgp5241.jpg gl --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
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