red buoy - A nun buoy. A conical buoybuoy with a pointed top, painted red, and having an even number, used in the United States for navigational aids. At night they may have a red light.
The red buoy shown in the far right picture flashes a red light every 2.5 seconds (Fl R 2.5s). This buoy marks the west side of the channel leading from the sea south to Norfolk, VA.
View Chart - Red Arrow #6 -- 255 KB ...
In approaching channels from seaward red buoys marked with even numbers will be found on the starboard side of the channel and must be left on the starboard side in passing in.
In both systems, green buoys are given odd numbers and red buoys are even. The numbering starts at "1" at the mouth of the harbor or river, and increases from there.
against the current. Red buoys must be kept on the right side of a craft when proceeding in the upstream direction. A simple rule is red to the right when returning, or the three "R's": red, right, return.
Keep red buoys to right and green to left while cruising upstream, or Red-Right-Returning if coastal boating.
Indicates Mid Channel.
Navigate to Port (facing upstream).
Indicates that there are diver(s) below;
be sure to give them a wide berth.
The red buoys are generally conical, and are called Nuns, and are assigned Even numbers, the green ones are generally cylindrical, are called Cans, and are assigned Odd numbers.
neap tide A tide with less than an average range that occurs at quarter moons nun buoy A conical red buoy with a pointed top and marked with an even number, found on the starboard side of a channel as you enter from seaward; ...
 See also: Boat, Channel, Light, Point, Course
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