A red coloured buoy marks the edge, or limitation, of a channel or fairway. The correct side to pass, will depend on where in the world you are.
There are two international systems organised by IALA (International Association of Lighthouse Authorities). IALA 'A' Used in European waters and IALA 'B' used in the Americas and countries influenced by America.
In Europe, if you see a red can shaped buoy and you are heading up a river (main stream of flood direction) you should leave it to port. (left hand side).
In USA waters, the red buoy will be conical, and/or have a triangular top mark. It will mark the Starboard side of the channel. When proceeding up river you should leave it on your Starboard side (right hand side)
Red right returning.
Red Buoys are called Nuns and green buoys are called cans. The red buoy is pointed on top and looks like a red nun floating in the water.
A boat should cruise between a green and red buoy. The red buoy will always be located on the right side of your boat. Red buoys will always mean , returning, red, and right. There will be a number on a red buoy that will give the chart location. The numbers will always be even.
Do not pass between the buoy and the shore
Keep the buoy on your right side
Keep the red buoy on the right side of your boat. If the red buoy is on the left side of the boat, you're about to run aground. "Red to the Right, Returning."
Pass the buoy so that it is to your right (red right returning).
A port or starboard buoy depending on what region you are in
red
A red cone shaped buoy, called a nun buoy, usually marks the right side of the channel when you are returning from the sea or going upstream. Remember it by saying, red, right, returning.
No. In accordance to the IALA system of buoyage, a tall white buoy, with vertical red stripes, marks the mid channel, or safe water.
A boat should cruise between a green and red buoy. The red buoy will always be located on the right side of your boat. Red buoys will always mean , returning, red, and right. There will be a number on a red buoy that will give the chart location. The numbers will always be even.