[ChrisNZ]

• The Angle of Approach procedure requires a Closed Plane Line per 10-5-E. Hence you are not using an Angle of Approach procedure if your Plane Line is Square (10-5-A), even though you are tracing the Angle of Approach that is inscribed on the Inclined Plane.
  
  
• The Angle of Approach, Arc of Approach and the Straight Plane Line are all inscribed on the face of the Inclined Plane, whether it is Open, Square or Closed. Hence if your club is On Plane, you will be Tracing all of these lines.
  
  
• For the new Closed Plane Line, which was the Angle of Approach of the Geometric Plane Line, there is also an Angle of Approach. However, there is no Angle of Approach to an Angle of Approach procedure.
  
  
• The Angle of Approach of your old Plane Line now becomes the basic Plane Line with the Angle of Approach procedure. Every stroke must have a Straight Plane Line. This Angle of Approach Delivery Line is automatically traced if the Club is On Plane.
  
  
• It is necessary to have a steeper Plane Angle when using the Angle of Approach procedure. This complements the visual covering by the Clubhead of the Angle of Approach.

Thanks for your post!

To your points in turn:

1. My mistake - you can obviously use the angle of approach as per 2-J-something or other (the bit about visual equivalents), but that musn't be the angle of approach procedure?

2. A really good point and a fog lifter for me - you have to watch those visual illusions!!!

3. I think I get this. Maybe. But don't ask me to explain it!

4. I get this.

5. But still, you'll only get true visual covering if the plane is so steep it's an eye plane!!! Nonetheless, as the clubhead gets close to the ground it will start to approximately cover the plane line visually (right?). I see now that it won't vertically cover it for reason 2 above.

Chris