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Reciprocal Course
When returning on a known course heading it is a
simple matter to compute the reciprocal course
heading. If the original course was less than 180
degrees we add 180 and if the original course was
more that 180 degrees we subtract 180 degrees. If
you draw your course line through the center of the
compass rose you can determine your reciprocal
heading that way. Finally, using the Charting Pal
you can easily place it on the other end of your
course leg and read the reciprocal course on the
outer ring.
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