NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Kent Nordström
Date: 2009 Mar 11, 17:16 +0100
Again thanks for your views regarding possible
limitations in lunar distances. I have gone through almost a dozen old manuals
and I have not found any stated limitation such as in the German manual from
1906. I didnt expect to find anything either. The only limitation I have found
in e.g. Tables Requisite from 1766 is about very short lunar distances, which
should require 6 fig logarithms and not 5 fig as usually used. The limitation is
in this context of no interest because distances less than about 30 degrees were
not taken because short distances were not tabulated in old NAs. But there
might be of interest to check the background to the German manual with an other
approach. On the pages Wolgang Körberer kindly provided there is a foot note
down on page 385 saying (my translation) that a comprehensive explaination for
these methods can be found in Allgemeinen Encyklopadie der Physik issued by G.
Karsten, in the chapter about time and finding positions, this chapter written
by G.D.E. Weyer. I have tried to find this reference on the internet without
success. I am going to alert my collegue about this hoping for an answer. But
perhaps somebody else has the above encyklopedie available and would like to
check.
Kent
N
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