Canovaro:
And an easy way to plot that parallel (Uboot) course line is to temporarily mark the intersection of the circle and target-Uboot-line with the pencil tool. Then grab the end of the circle's arrow and extend the circle radius through that pencil mark until the Uboot is inside the circle. Then drag the center of the circle along the targets course line until the circle-radius overlays your Uboot. Now the circle radius (towards the center) is your course line to the interceptpoint.
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