Related Clues:

• 'Das Boot' setting
• German threat
• One trying to avoid charges?
• Go through channels?
• Sub that sank Allied ships
• Member of a W.W. II wolf pack
• Dangerous sub
• It tried to avoid charges?
• Do laps, perhaps
• It may give a sinking feeling
• Tin can's target
• W.W. II sub
• German diver
• Do the butterfly
• WWII sub