Ian W;
The point i'm making is the fact that the controller could see the planes landing lights doesn't necessarily mean the pilots could see the PAPIs. The controller is in a tower well above the runway and well past the PAPIs, and have a very different line of sight to the plane than the planes line of sight to the PAPIs. I probably have to sift through this thread to gather some height and distance data and do the calculations whether the pilots could see the PAPIs when they cut the first threes.