You basically have to keep that type of buoy to your right if you are traveling up stream.
Lateral red and green buoys and markers are used in maritime navigation to indicate safe channels for vessels. Red buoys, typically marked with an even number, indicate the port side of a channel when entering from the sea, while green buoys, marked with an odd number, indicate the starboard side. This system helps mariners safely navigate through waterways by providing clear visual guidance on channel boundaries. Together, they form part of the IALA (International Association of Lighthouse Authorities) buoyage system.
Red buoys have even numbers and red lights; green buoys have odd numbers and green lights.
Nuns are red.
When heading downstream (away from harbor) leave the red buoys to port and the green buoys to starboard.When heading upstream (back in to harbor) it's the opposite: leave the green buoys to port and the red buoys to starboard.
The main purpose of the lateral system of red and green buoys and markers is to indicate the sides of a navigable waterway or the location of hazards. Red buoys/markers should be kept on the right or starboard side of the boat when traveling upstream, while green buoys/markers should be kept on the left or port side. This system helps to ensure safe navigation and prevent collisions.
In the United States, when you are outbound for sea you would have red buoys (even numbered) on your port side(left) and green buoys on your starboard side (right). When returning fromsea you would have red buoys on your starboard (right) side (Remember " Red right return") and green buoys on your port side (left).
Preferred channel markers are buoys showing red and green bands.
When going into a port or harbor, you should keep green buoys on your left. When leaving a port or harbor, you should keep green buoys to your right. A good way to remember this is the phrase "Red, Right, Return." This phrase means that you should keep Red buoys on your Right (thus keeping green buoys on your left) when coming into a port/harbor (Returning).
Nun buoys typically have odd numbers. In the IALA buoyage system, odd-numbered nun buoys are used to indicate the right side of a navigable channel when approaching from seaward. They are usually colored red and have a conical shape. Even-numbered buoys, on the other hand, are used for the left side of the channel and are typically green.
Some red buoys are known as "nun" buoys.(Ref: SB-4)some red buoys are known as nun buoys
Nun buoys are typically marked with a single red mark, while can buoys are marked with a single green mark. These marks help to indicate the direction in which boats should pass the buoy in order to navigate safely through the waterway.
Swim area not!! It is the navigable channel