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    Running fix course.
    From: Byron Franklin
    Date: 2009 Dec 22, 14:11 -0800

    The running fix, certainly if other fact are know, they should be
    used.
    Estimates are not of certain, so should be closely monitored.
    I would use both TRF & ERF and DR., but pick the one closer to danger
    to watch.
    If course, speed or distance is known use it.
    An old way to find course, when three LOP�S are plotted from one
    NAVAID with out a change of speed or course (BRG. Time must be the
    same for each LOP.)
     Let�s use an idea known to all. This is the BOW-BEAM & QUARTER.
    This will work with any RFIX.
    WE don�t know it but we are heading NORTH or this could be relative
    brgs.
    Off the STBD bow {at} 045 We plot 1st LOP.
    Off the beam will plot 2nd 090 LOP?
    Off the Quarter we plot 3rd 135 LOP.
    I think we all know the answer is distance run between bearings is
    distance off NAVAID at 090 Beam.
    No set and drift for this can problem. If we used a TRF we would have
    a tree pointer at LOP 135.
    Using the tree LOP�s, Let us find the course, we are on.
    We set the dividers at any spread larger than the distance between LOP
    1 and LOP 2.
    We mark the LOP1 at the point of the divider (A) at LOP 2 we mark the
    other point (B).
    Using the same spread and parallel to (A&B) we place the dividers
    between LOP2 (C) & LOP3 (D.)
    A line drawn from A to D is your course. Your speed and distance is
    the only part left.
    
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