You go inside that space that has the bouy and stay to the port-side of the bouy.
You are traveling upstream on a river at dusk. You see a buoy with the number 4 and a flashing red light. What should you do?
lp
A flashing amber light means approach the lock at a safe speed and under full control.
Keep the buoy on your starboard (right) side.
If they have a green flashing light on top of their car, then they are a Doctor, and have as much priority as a regular emergency vehicle.
A flashing green light in Canada indicates that a pedestrian has pushed the button to cross the street, and drivers should yield to pedestrians.
When going upstream, a buoy with a number 5 and flashing green light indicates the presence of a dam ahead. The dam may be used to generate hydroelectric power or to provide water for irrigation, and can pose a danger to boats and other vessels.
Green
Cleared to cross
unknown
When approaching a flashing green light in Canada, drivers should proceed with caution and yield to pedestrians and other vehicles as necessary.
Cleared to cross