I'm surprised. I believe the latest research shows wake vortex can climb as well as descend so even if the procedures require both aircraft to go around if the lower one does, I am not convinced that this is wise. I am not a mathematician but I would have thought that on a 3 degree glide path one would have to displace the threshold by 1 mile to be 100 feet above the preceding's profile? That doesn't seem a sufficient margin to me.
How much is the threshold displaced by? Is there a second glide path or is it purely a visual thing?
It is an interesting idea. I know they thought about it here for a while; I don't know why it was shelved.
[ 05 August 2001: Message edited by: ZeroNine Left ]