I agree that Discovery Wings has taken a dive. They do some good stuff, but its mostly the engineering side of it - like the making of the A380, or FlightPlan where you experience a day in the life of an airliner. National Geographic is good, again if you're into the engineering of it. They show a lot on Air Crash Investigation etc.
Basically you've got to pick a day and hour slot if you want to see anything good. The rest is pants. What's ships and trains got to do with wings I ask you .. If you do get a reply or whatever from Discovery, would be good to hear about it Sparky
ffw