Related Clues:

• Arctic shipping hazard
• Growler beginning to irritate church composer
• Losing wings, sick bird repelled main danger
• Subject featuring more than meets the eye, its victim earlier brought up by the same author
• Seabird approaching islands turns tail to find colder destination
• A danger to shipping, one key diver recalled
• What sunk the Titanic
• Main hazard when diver starts to cough it up
• Lettuce that has hidden depths?
• Large block of frozen water
• Shipping hazard, even traces of zinc, diver raised
• Hazard of polar seas
• Cig with beer cocktail? ``Avoid it!'' says the captain
• Titanic breaker
• Frozen shipping hazard