NavList:

   

Reply

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@navlist.net
To , send email to NavList-@navlist.net
-~----------~----~----~----~------~----~------~--~---

   

Reply