I see. So you're saying every day, twice a day, 50 different airlines are sending their preferred tracks to Oceanic? I would have thought the only input required is for the Oceanic Planner to look at where the jetstreams are as well as rocket firing etc and use that to set eastbounds and westbounds. So sometimes the tracks go right up over Greenland to get/avoid the winds. Whatever the mechanism, winds are the driving force in track allocation. I'm sure airline input is minimal.