NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Lunar Distance in Wikipedia
From: James R. Van Zandt
Date: 2007 Aug 21, 21:57 -0400
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 them. 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 paragraphs: 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 --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---