Originally Posted by
Sailvi767
LHR utilizes 2.5 miles with a single runway operation. Any US airports can do the same. The problem is that at SFO the runways are 250’ apart. If you limit approaches to IFR you effectively become a single runway operation and cut your arrival rate in half. Either you do visuals or dramatically slot restrict the airport.
If one aircraft is using the ILS is there something at KSFO saying every aircraft has to? I understand losing a single gap because you can’t do a parallel approach for that aircraft - it’s a heavy in this case so the gap behind is probably going to be standard separation anyway - but then you just go back to paired visuals again right?