Related Clues:

• Coral ridges
• Sailing hazards
• Ross Sea sights
• Navigational hazards
• Shipping hazards
• Coral constructions
• Locations for some schools
• Alaskan cruise sightings
• Bow breakers?
• Keel scrapers
• Coral structures
• Shipwreck sites
• Florida Keys features
• Nautical hazards
• Snorkeling destinations