Naval War College Review Vol. 67, No. 2, Spring 2014 INNOVATION FOR ITS OWN SAKE: The Type XX... INNOVATION FOR ITS OWN SAKE: The Type XXI U-boat This is the metadata section. Skip to content viewer ...

The submarine was one of Nazi Germany’s Type XXI U-boats, which could stay underwater for longer and travel further than their predecessors. Only two of 118 planned Type XXIs entered service ...