Which one of the following is true about red bouys under the U.S Aides to Navigation System?

Under the U.S. Aids to Navigation System, red buoys are typically used to mark the right side of a channel when returning from sea, following the "Red Right Returning" rule. These buoys are often cylindrical in shape and may have a topmark, such as a conical point. They indicate safe passage for vessels navigating inland waterways. Additionally, red buoys are part of the IALA System A, which is used in most regions worldwide.