What does the symbol Group of rocks, bare or awash signify on coastal charts?

What does the symbol Group of rocks, bare or awash signify on coastal charts?

• A. A group of rocks that are bare or awash
• B. A single rock protruding above water
• C. A submerged reef system
• D. A sand and gravel deposit

Answer: (A)

Coastal charts use symbols that convey where hazards to navigation are and how they behave with the tides. The symbol for a group of rocks, bare or awash specifically indicates several rocks clustered together that may be exposed at low tide or just at the water’s surface. It warns that the danger isn’t a single rock but a rocky area that can be partially visible, requiring careful navigation to avoid collision or grounding.

This differs from a symbol for an isolated rock, which marks just one rock protruding above the water. A submerged reef system would be shown with a symbol indicating reefs under water, and a sand and gravel deposit isn’t a rock hazard symbol at all.