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    Re: Assumed altitude method
    From: Peter Fogg
    Date: 2009 Jul 12, 17:07 +1000
    Dave Walden writes:
    I have read "The Method of Assumed Altitudes: A New Approach to an Old Art" by T.D. Davies (from the ION disk).  I don't yet have any of Davies' Tables themselves. 

    Am informed that T D Davies' Sight Reduction Tables come in two volumes.  One is for 42 stars and the other for the sun, moon and planets.   Both are fairly large, about 220 X 300 cms.  Latitude range is 0 - 60 degrees, Star places etc are based on the epoch of 1980, which introduces additional corrections when observations are made remote from 1980.

    These tables are not understoond to have been popular, when compared with the standard Sight Reduction Tables NPO 401 and HO 229  which require four volumes to cover 60 degrees of latitude and a current Nautical Almanac.


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