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    Re: Systematic Error (LOPs revisited)
    From: Peter Fogg
    Date: 2003 May 29, 12:15 +1000

    In the beginning was chaos, the little boat was bobbing about upon the briny
    deep, no land in sight, no idea where he might be.
    Then came systems of navigation, imperfect certainly, that said - Well, the
    indications are that we are "here".
    Well goodo. Everybody on board was thinking (but were too polite to say) -
    But if we're not "here" then where are we?
    What was lacking was a method that could say - If we're not "here" the
    further indications are that we are "there".
    My problem with the Great LOP Controversy was that all it proposed was a
    giant step backwards to chaos, all it could suggest was that the little boat
    was still lost.
    The technique George Bennett proposes is a step in the other direction, a
    practical method to graphically examine the data and establish "there". This
    is the end game, to take a fix position in terms of latitiude and longitude
    and propose another, hopefully more accurate, inside or outside the LOPs.
    While I was tapping away at this a call came from George Bennett on his
    mobile (cell-phone) on their way to the airport, but still thinking about
    this. He asks me to add that the bisectors can be and should be signed, as
    in plus or minus, towards or away from the direction of azimuth. More order
    to the chaos.
    There was a slogan promoting tourism in the Northern Territory, which is a
    little like Australia's 'Wild West', known locally as 'the Never-Never',
    that went 'You'll never-never know if you never-never go ...'
    This technique is a bit like that. You'll never-never know if its a dud or
    not unless you get into it. Theorizing about it in front of the computer
    will be of  limited assistance. And be encouraged, if I can start to
    understand it then you probably can too. I already know there are far finer
    minds than mine out there on the Nav. List.

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