Im curious how flight operations work with Fedex sweep flights. An example lets say SEA to MEM. I imagine a route would be fly north over Boise, Calgary, Billings, Minneapolis before turning south to Memphis. If a flight needed to divert to pick up extra cargo, how does this work? I know they would inform ATC about diverting to a city. But how about IFR alternates. And calculating airplane performance at that airport.
[Edited 2013-11-13 15:44:09]