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    Re: That darned old cocked hat
    From: Peter Fogg
    Date: 2010 Dec 16, 05:05 +1100


     Andres Ruiz wrote:
    This could be of interest:
    ACCURACY OF POSITION FINDING USING THREE OR FOUR LINES OF POSITION

    With a supplied PDF file, reattached.  In case anyone missed this, here is the conclusion of this 1946 paper by S A Goudsmit:

                    SUMMARY
    If at location is determined by the inter-
    section of three lines of position, there is a
    chance of only one-quarter that the true posi-
    tion lies inside the residual triangle. lf the
    location is determined by the intersection of
    four lines of position, the chance is one-half
    that the true location lies inside the larger
    quadrangle formed by the four lines.

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