Those are very cool, Jim. I've always been very interested in U-boats, especially after I saw Das Boot for the first time.
Das Boot got me interested in them as well. Those paintings are really great renditions, especially the underwater ones where you can see the full size of the U-boat.
Thanks for posting those images. I have yet to see Das Boot. I have seen K-19, U-571 and The Hunt For Red October. My interest in subs was also sparked by Tom Clancy's book Submarine.