So I would say that although the Hitter sees the Clubhead visually (it's not actually covering- because the Plane would have to be vertical for that to happen!) covering his new Plane Line (the Angle of Approach), he is actually Tracing is also.
Just look at 10-5-E.
I would have thought this was the other way around - the clubhead actually covers the angle of approach, not visually covers it (although as the clubhead gets closer and closer to the ground it would get closer and closer to visually covering it as well). Why do I think this? Because the location of our eyes isn't part of the geometry of the stroke - if my neck grew 20 feet then visually covering the angle of approach would change the geometry (the length of my neck would affect the geometry of the stroke). But then I take your point about the plane having to be verticle if the plane is really closed - so perhaps it neither visually nor vertically covers the line (exactly) with 10-5-E. With an angle of approach procedure and a plane line that was square, it would actually (vertically) cover the angle of approach though, wouldn't it?
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