Related Clues:
- Snorkelers' spots
- Hidden hazards for boaters
- Hidden hazards off shore
- Hazards for a 65-Across
- Submerged ridges of rock or coral
- Often submerged shipping dangers
- Thus shortens said — to avoid these dangers?
- Coastal lakes
- Bodies of water cut off from larger bodies by reefs
- Hidden maritime hazards
- Raise charge in case of rapids or rocks
- LA heavies spotted in the Lakes?
- Some endangered ecosystems
- Atolls, e.g
- Submarine ecosystems