Related Clues:
- Battle of the Atlantic vessel
- Underwater vessel
- Wolf pack units
- W.W. II ship sinker
- WWII German threat
- German submarine of WW2
- Submersible warship armed with torpedoes
- German submarines of WW2
- Submersible warships
- German submarines of second World War
- Submersible warship of WWII
- Submersible ships of WW2
- German submarines in WW2
- German submarines
- From this one could get about, but not on the surface