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    Re: "100 Problems in Celestial Navigation"
    From: Renee Mattie
    Date: 2004 Apr 4, 16:24 -0400

    I want to thank everybody who chimed in on this thread
    about Leonard Gray's 100 problems, cocked hats, and
    sight reduction methods.  I have found it edifying.
    I would be happy to compare my results to those
    obtained by others.
    I have a couple of questions:
    + Is there a copyright issue to posting the text of
    one or several of these problems?
    + What about sight averaging?  I have read recommendations
    to plot the altitudes of three sights taken in rapid
    succession and use an altitude/time average, or to find
    a best-fit line of the proper slope.  Here, folks seem
    to prefer to plot the LOPs from all three sights.  I suppose
    this gives you some notion of the size of the error in the
    individual sights.  I find it difficult, when examining the
    result, to decide where to mark an MPP, which is, I guess,
    the point.
    Leonard Gray does not give any notion of how close he feels
    the student should come to his answer.

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