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    Re: Bowditch 1995 Table 18
    From: Doug Royer
    Date: 2005 Feb 2, 16:43 -0800

    "... but is sometimes measured from 0? at the
    heading either clockwise or counterclockwise through 180?, when it is
    designated right or left."
    Jim, I don't know where you got this.Relative bearings are ALWAYS taken from
    the head in a counterclockwise(right to left,0 - 360)manner.
    There is a reason for this.One ship takeing clockwise bearings and another
    takeing c-clockwise bearings is a recipe for disaster.
    RBs are always taken/given in the above prescribed format.
    Here's a visual aid:
    RB + MH = MB
    RB + TH = TB
    MB - MH = RB
    TB - TH = RB
    Example navigating a vessel and talking to another over the VHF;
    vessel # 1
    I'm in position approximate XYZ on a heading of 210 degrees true,14 kts.I
    have you relative at 67 degrees,range 9 miles..
    Now the 2nd vessel only has to take the recipical of that 67 * relative
    bearing and that range and run the bearing line and range on the chart from
    it's pos to plot vessel 1's pos.
    Kind of dangerous takeing/giving relative bearings any other way due to
    I worked your question this way:
    Course = 002 T.
    Bearing 1 = 295 T, so
    RB = 293, or 067 to port.
    Bearing 2 = 245 T, so
    RB = 243, or 117 to port.

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