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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Lunars: Weymouth log (revised)
From: Frank Reed CT
Date: 2004 Dec 8, 21:53 EST
From: Frank Reed CT
Date: 2004 Dec 8, 21:53 EST
Alex, you wrote:
"This applies to "other log books". What do you think DR Lat
means in THIS log book?"
means in THIS log book?"
Oh sorry. I should have looked at that.
Considering that there appears to be no cumulative difference (only daily
"random" differences), I think it's safe to assume that he is refreshing the DR
latitude daily with the observed latitude. This is an intermediate period when
navigators were still not certain that the observed latitude was necessarily
correct (though probably correct). Also, navigators would sometimes
speculate about currents based on the differences between Lat Obs and Lat
DR.
Frank R
[ ] Mystic, Connecticut
[X] Chicago, Illinois
[ ] Mystic, Connecticut
[X] Chicago, Illinois
