What you call them depends on where they're made. A U-boat is nothing more than the Anglicized term for a German submarine and isn't strikingly different from U.S. subs. The whole "boat ...

The Brazilian Navy has confirmed that a wreck found in 2011 is that of a Brazilian auxiliary ship sunk in 1944 by a torpedo from the German U-boat U-861. About 100 lives were lost when the Vital ...