NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Hewitt Schlereth
Date: 2012 Dec 24, 11:11 -0800
Sent from my iPad
Merry Christmas to you Hewitt, and to all Navlisters.
Reeds Astro Nav Tables are also available from Amazon for earlier years.
I believe it is possible to part exchange old for new with Amazon, and I have been wondering what the market is like for old almanacs? - probably better than for old tide tables, anyway. :-) It occurs to me that having Reeds for four consecutive years would serve as a ready source of the ephemeris with (or without?) the quadrennial corrections. In any one year, three of them could be left on the bookshelf and one taken to sea. Four almanacs, with their sight reduction tables, are together a lot slimmer than Nories, but in A4 format.
Can anyone shed light on the accuracy of using an almanac that is exactly four years out of date? I know this is the basis for many long term Almanacs - HO 249, Bowditch, Geoffrey Kolbe etc.
John
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