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    Re: Lunar Distance in Wikipedia
    From: James R. Van Zandt
    Date: 2007 Aug 21, 21:57 -0400

    I have reworked Wikipedia's "lunar distance" article, incorporating
    some text from George Huxtable's message of Aug 16.  I hope he doesn't
    mind my changes.
    I changed the "errors" section last night, and since then I see
    somebody has already cluttered it with lots of [citation needed]
    notations.  I suppose they'll do the same with the paragraphs I added
    tonight.  Feel free to add citations, or to suggest them and I'll add
    By the way, the other celestial navigation articles at Wikipedia could
    use some work too.  For example, in the "longitude by chronometer"
    article, the "methodology" section finishes with these three
      The local hour angle is then added to the Greenwich hour angle to
      obtain the longitude where the position line passes through the
      assumed latitude.
      To draw the position line on a chart the azimuth or bearing of the
      heavenly object must be known. It is usually calculated but could have
      been observed. A line at right angles to the azimuth is drawn through
      the calculated position. The observer is somewhere on this line.
      To obtain a fix (a position) this line must be crossed with another
      position line either from another sight or from elsewhere e.g. a
      bearing of a point of land or crossing a depth contour such as the 200
      metre depth line on a chart.
    I would like to delete the last two paragraphs because they really
    apply to the intercept method instead.
                 - Jim Van Zandt
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