Originally Posted by
underfire
The FAA program, Simultaneous Offset Instrument Approaches (SOIA) allows for as little as 750 ft between runway centerlines.
The FMS Quiet Bridge visual is an example.
SOAI is a bandaid, not a solution.
Simultaneous, independent ILS approaches, both to at least CAT I (if not CAT II/III) are the only real traffic movers during the lousy weather conditions that a place, such as SFO has.
Look at ORD, then look at SFO. Look at DEN, then look at SFO. Look at ATL, then look at SFO...IAD, DFW, MCI, and so forth.
During my career with TWA, 1964-90, the worst rush-hour, non-weather delays were always at SFO. I can remember many long traffic holds at CEDES at 6:00 PM, when the weather was either good VFR or marginal VFR.