Originally Posted by
ATC Watcher
Framer : I could not agree more .
RAT5 : I thought we have visual APP because it increases both efficiency and capacity . As a controller, if you all want ILS only and 2NM spacing ? no problem for me , on the contrary , but this means you all get down to the same speed to the Kt from the OM onward...abut even then , wake turbulence separation is likely to upset that.
Numerous airports in Europe, all busier then SFO (by flights), use almost only ILS. Rarely visuals, no RNAV, just 99% ILS. Even with 4NM spacing, slow and fast traffic.
So it can be done efficiently, but probably depends on layout and (noise) procedures.