If we see the pencil move from the vertical position, 230° is no longer the course from your
present position to your desired position.
Note in Figure 10 that the dotted line represents our original course. Ideally, the flight path
of our aircraft should fall on it at all times.
As our aircraft progresses along the course, we should be able, at any time, to connect our
new position and our desired position and find that our course remains 230°. If we find
ourselves at the point indicated by the arrow, our course can no longer be 230°, it is instead
about 220° as is indicated by the solid line. (Figure 10)
TACAN POINT-TO-POINT 5-9