The U-612 used during filming is a non-diving u-boat replica of the US Navy submarine S-33 built in Valetta, Malta. It was heavily modified but is the same watercraft used for U-571 (2000).
I have no idea why so many bad reviews. It's not like the original, so what . The cast, the settings and attention to detail is top notch. Good story lines far better than most programs available. Yes I like it .
