Use of the parallel ruler 3

Steps to determine the direction or the true course, continued.
Fourthly, place one side of the parallel ruler on the center of the compass rose. As you can see from the example, you have two readings, 110° and 290°.
To find which course to use, 110° or 290°, imagine that you start point A in the center of the compass rose, so that point B will then show the direction and therefore the correct reading. In your case, point A is at the center of the compass rose and point B shows the direction, therefore the reading of 110 degrees.
In contrast, if you depart from point B and you want to arrive at point A, following the previous example, you should follow a true course of 290 degrees.