[Mike O]

Target Line is an invisible straight Line from the Ball to your intended Target. Line of Flight is the initial straight-away flight of the Ball in the context and aligned to the vertical Plane.

Daryl,
In the world according to Homer:
That's not correct - hopefully someone else can verify via book quotes the right answer.
The drawing's you did are really awesome - great skills to have - although they are not correct - again - you guys are wearing me out - maybe someone else can bring up the issues that are incorrect in them.