NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Raw data for bubble
From: Frank Reed CT
Date: 2007 Mar 12, 01:27 EDT
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From: Frank Reed CT
Date: 2007 Mar 12, 01:27 EDT
"Why does the moon decrease the accuracy of the fix?"
Apart from the usual reason (extra steps in the calculation leave room
for errors in calculation), this has to do with the nature of bubble sextant
observations, if I'm not mistaken. You center the object in the bubble. Since
the Moon is only perfectly round one day a month, that is a somewhat difficult
task. You have to imagine where the true center of the Moon is and place that at
the center of the bubble. Doesn't apply to ordinary sextants!
Still hoping to get back at that darn Moon, eh, Robert?
-FER
42.0N 87.7W, or 41.4N 72.1W.
www.HistoricalAtlas.com/lunars
42.0N 87.7W, or 41.4N 72.1W.
www.HistoricalAtlas.com/lunars
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