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    Lunar Distances: Graphic Methods
    From: Robert Eno
    Date: 2004 Apr 21, 22:59 -0400

    Henry Halboth wrote:
    > I have also come across a graphical method of clearing the distance, for
    > which some degree of accuracy is claimed, and which is advocated as a
    > check against other calculations. This graphical solution was being
    > touted circa 1822 in Arnold's Lunarian - I really don't know or remember
    > if you have actual calculations made by L & C.
    Robert responds:
    Bruno Ortlepp wrote a very interesting paper on this subject entitled
    "Longitude Without Time" and which appeared in the Journal of the Institute
    of Navigation, Volume 16, No. 1, Spring 1969.
    Eight years later, J.W. Luce submitted a paper on another graphic lunar
    method in Vol 24, No. 2, Summer 1977 of the same Journal.
    Both are very interesting papers and worth the read. The allure of these
    methods lies in their simplicity and a circumvention of the drudgery of
    complex calculations. I have tried both methods but without much success. I
    have had much better results using the tables developed by Bruce Stark.
    You know you are in too deep when you start thinking about and performing
    lunars. Give up hope all ye who enter here.

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