Related Clues:

• Shoal
• Mariner's worry
• Offshore ridge
• Boating hazard
• Shipping obstacle
• Current creation, sometimes
• Coastal buildup
• Boater's worry
• Marine hazard
• Spit in the sea
• Land line?
• Boater's obstacle
• Long narrow deposit in the sea
• Shallow in sea or river
• Danger for sailors, moreover, in small tavern