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    Re: Still on LOP's
    From: Bill Murdoch
    Date: 2002 May 3, 20:21 EDT
    I am still having a hard time with the 25% of the time you are inside the cocked hat rule.  It just does not 'feel right'.  I have played around with the Excel spreadsheet map that I mentioned a week or so ago, and I can not get the calculations to work like I think they should.

    We have been discussing LOPs in two-dimensional (surface) navigation.  I have what may be a simpler question.  What rule applies in one-dimensional navigation?  Let's say you are a tightrope walker, getting nervous, and want to know exactly where you are on the rope.  You whip out your sextant and with a little skill and calculation plot two POPs (points of position).  The two POPs are not in the same spot (naturally).  What is the chance that you are between the two POPs?  What is the chance that you are to one side of both?  What is the chance that you are on the other side of both?

    Bill Murdoch

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