|
|
Subject: Re: Lunar distances
From: Nigel_Gardner (Nigel_Gardner@XXX.XXX)
Date: Sat Jan 26 2002 - 08:03:00 EST
Further to my last note, I had forgotten that I have a copy of 'Cloudy
Weather' Johnson's book 'Nautical Astronomy Made Easy' subtitled 'The
solutions of the various problems being effected by a small table on one
page. Designed to economise time and labour'
He describes the lunars as follows:- ' The value of the Lunar Problem as an
independent means of determining the Greenwich Time in case of an emergency
being generally admitted, attention is invited to the very simple method
contained in this book, in which it will be seen that nearly the whole of
the computation is made by means of the same little Table, so that the
distance may be cleared and the Greenwich Time found with the utmost ease
and expedition'
The trouble is that his methods rely on having a tabulated LD from the
Nautical Almanac.
NG
|