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    Re: Plotting Tools?
    From: Jacob M. Huffman III
    Date: 2019 Apr 4, 23:05 -0500
    The proportional divides were one of the most useful nav tools I ever had.  Setup is simple:  slide the set screw with pointer to your groundspeed and tighten the screw.  Open the wide end to the exact distance between two points, then carefully set the narrow end against any convenient scale or line of longitude.  The distance between the points is the estimated time enroute (ete).

    On Thu, Apr 4, 2019, 3:48 PM George F. Prescott <NoReply_Prescott@fer3.com> wrote:

    Navigators, I recently received a gift box of plotting instruments, including a proportional divider.  Could you direct me to a publication and/or website which would instruct me as to the correct use of the instruments, esp. the p-divider?  Thanks!

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