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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?
keep the buoy on the starboard side
lp
Have the bout on your right
no
Keep the buoy on your starboard (right) side.
Since this is a Green Lighted Buoy sighted while approaching a harbour,this is a Lateral port hand side mark, IALA region B. To keep this buoy on your port side while travelling upstream.
You go inside that space that has the bouy and stay to the port-side of the bouy.
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.
it doesn't indicate anything, aside from the fact that the buoy is there. the light simply makes it more visible in foggy or dark conditions.
You are boating near shore at twilight. You see a square-shaped daymark. You cannot make out the marker's color. What color is it?
You are boating near shore at twilight. You see a square-shaped daymark. You cannot make out the marker's color. What color is it?