What is true about red bouys under the us aids to navigation systems?

Under the U.S. Aids to Navigation System, red buoys are typically used to mark the right side of a channel when entering from open water, following the "red right return" rule. These buoys are often cylindrical in shape and may have reflective markings or lights to enhance visibility at night. Additionally, they may display numbers that correspond to nearby navigational charts, helping mariners identify their location.