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    Re: Horizontal Sextant angles plot.
    From: Peter Hakel
    Date: 2010 Nov 30, 18:41 -0800
    A very clear step-by-step explanation, thank you Greg.  A variation on Step 1 (finding the center of the AB segment) is attached.  It uses arc radii larger than half the AB distance with only slightly more clutter.  The dashed lines need not be actually drawn (they only guide the eye and straightedge) and the arcs may be erased in the end.


    Peter Hakel



    From: Greg Rudzinski <gregrudzinski@yahoo.com>
    To: NavList@fer3.com
    Sent: Tue, November 30, 2010 10:56:59 AM
    Subject: [NavList] Re: Horizontal Sextant angles plot.

    Linked are images of a 45° horizontal sextant angle plot using a course plotter, divider compass, and straight edge (parallel rule). The radius point on the chart is determined with the least amount of plot clutter. The center point between marks A and B can remain on the chart permanently for future plots. Only the arc of position near the course track DR needs to be plotted. This technique would be used when three fixed terrestrial navigation marks are not available for the three arm position pointer.

    Greg Rudzinski
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