Yesterday leaving an airport I visitied briefly I entered my course home (basically due west) and took off.
I followed the noise abatement procedure and climbed straight out (north from Runway 36) for two miles before turning west for home. This of course took me well past the direct purple course line from one aiport to the other.
I got two 'Blue lines' from current position - one made sense, direct to my next waypoint (home) and another from my current position to the little black-dot (top of climb) waypoint back on purple line (which I now was not following). I don't think it makes sense to actually draw a direct (blue) line to those vertical planning "psuedo" waypoints. Which one should I follow? 