Vince, I’m not sure how you did your calculations, but my calculations are as follows. At a distance of 150 to 175 meters (492’ to 574’) and an angle of 60 degrees the height at the intersection (max height) would be 854’ at the 150 meter mark and 994’ at the 175 meter mark.

Brett is correct that it would be even higher at the box ends.

Mike, though it’s not necessary or common to exceed the 60-degree line when one’s at the proper distance, I think it’s pretty clear that most pattern fliers will not keep below the 400’ level. The possible exception to this would be sportsman.

Keith B