Related Clues:

• Lusitania undoer
• WWII threat
• WWII ocean menace
• WWII craft
• German vessel in WWII
• Torpedo shooter
• Wolf pack vessel
• Sub of WWII
• Naval convoy menace
• German war vessel
• WWII torpedo launcher
• German submarine
• WWII enemy sub
• "Das Boot" setting
• WWII German sub