Left (Port) side
Keep a green lateral marker to your left, or port, side when proceeding in the upstream.
Right (starboard side)
::Keep the marker on your starboard (right) side
If you are traveling upstream on a river and see a red triangular daymark, you should pass this marker on the left side.
When encountering a green marker buoy while heading upstream (returning from sea), you should keep the buoy on your starboard (right) side. This indicates that you are in a navigable channel and that the buoy is marking the channel's edge. Make sure to maintain a safe distance from the buoy and follow any applicable navigation rules. Always be vigilant for other vessels and potential hazards in the waterway.
This is a channel marker, placed on the edge of a channel. Green markers will always have an odd number on them. If you are heading upstream it should be to your left. If you are heading downstream it should be to your right. It will be opposite a red marker or bouy with an even number on it. To aid in navigating, the term "red, right, returning" is used meaning as you return from open waters (head upstream), the red marker, bouy, sign etc, should be to your right. That means the green one, in your example with a 3 on it, should be to your left. If its on your right side, you are outside the cleared channel area.
This is a channel marker, placed on the edge of a channel. Green markers will always have an odd number on them. If you are heading upstream it should be to your left. If you are heading downstream it should be to your right. It will be opposite a red marker or bouy with an even number on it. To aid in navigating, the term "red, right, returning" is used meaning as you return from open waters (head upstream), the red marker, bouy, sign etc, should be to your right. That means the green one, in your example with a 3 on it, should be to your left. If its on your right side, you are outside the cleared channel area.
When traveling upstream on a river you see a red triangular daymark, so you should pass on the left side.
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?
When traveling upstream and encountering a junction buoy with a green band on top, you should keep the buoy on your right side. This indicates that it marks the entrance to a channel, directing you to the preferred channel on your right. Make sure to navigate according to the buoy's guidance to ensure safe passage.
they should be passed on your starboard side when going upstream
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?