Related Clues:

• ''Das Boot,'' for one
• Fielder's cry
• Liner threat, once
• Depth charge target
• UMWA word
• World War II sub
• Collier's workplace
• Where to find a rock group
• Warship danger
• Naval destroyer
• "The Enemy Below" threat
• Convoy chaser
• Get ore from
• Sweeper's target
• WWII submarine