Related Clues:

• Titanic problem
• Titanic problem?
• Big chip off the old block?
• Only about 10% of it is visible
• Helmsman's headache
• Titanic's problem
• Titanic's downfall
• Variety of lettuce
• Cold mountain?
• Glacier offshoot
• Floating ice mass
• Arctic navigation hazard
• Only about 10 percent of it is visible
• It keeps its head above water
• Ice chunk