What symbol indicates the presence of a hazard on the water?

The presence of a hazard on the water is typically indicated by a rectangular sign with orange letters. These signs are designed to alert boaters to potential dangers such as rocks, shallow areas, or other hazards that could pose risks to navigation and safety. The bright orange color is highly visible on the water, making it easy for boaters to identify these warnings even from a distance.

Other options, while they may represent various signals or markers, do not specifically convey hazard warnings in the way that the orange-sign does. For example, while a colored flag could indicate various conditions, it lacks the standardization that the orange sign provides specifically for hazards.