They do have the scanners at some T stops, last I rode they weren't functional. All the drivers I've had or the station attendant just need to see the mobile ticket and you should be good.

They were auctioned off. They were all original hulls, but new engines, transmissions, and more for safety. I believe all were used in WWII for training in the US, as the majority of DUKW's were left overseas or scuttled after battle so they didn't have to transport them home.

I worked there as a narrator and captain! It was very unfortunate, almost all other duck boat companies heavily modified and extended the hulls, where Pittsburgh was independent and very strict on safety. I miss driving those boats so much and had no worries about the safety while on them, but those few accidents hurt the "duck tour" name so much.