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What does the flashing light on a cautionary buoy indicate?

  1. Flashes green every four seconds

  2. Flashes red

  3. Flashes yellow every four seconds

  4. No light is present

The correct answer is: Flashes yellow every four seconds

A flashing yellow light on a cautionary buoy indicates that there are potential hazards in the surrounding area. This means that boaters should proceed with caution and be aware of any potential dangers. Option A, a flashing green light, typically indicates the presence of a safe channel or indicates that a vessel can safely pass a certain point. Option B, a flashing red light, typically indicates a danger or obstruction that boats should avoid. Option D, no light, is incorrect as all buoys are required to have some sort of light or marker to aid in navigation and safety.