A U-boat is nothing more than the Anglicized term for a German submarine and isn't strikingly ... faster (six knots at the surface, eight knots underwater), farther (a range of 25,000 miles ...

This was an attempt to build an underwater cruiser ... most of them about the size of the German U-cruisers; the RO coastal boats, roughly the size of the German Type VII (see 1935) but not ...