What color lights indicate the boundaries of a channel?

The correct identification of channel boundaries is indicated by the use of specific colors of lights. Red and green lights are essential in marking navigable channels for vessels, with red being used for port (left) side boundaries when entering from the sea, and green being used for starboard (right) side boundaries. When a vessel approaches a channel from the open sea, it should keep the green light to its right and the red light to its left, allowing for safe navigation through the channel.

While white lights have specific uses, such as marking mooring buoys or other navigational aids, they do not specifically indicate channel boundaries. Blue lights are not standard in marking channels and have more specialized applications, such as in law enforcement or special use cases. Thus, the lights that indicate the boundaries of a channel are indeed red and green, with red being an essential color indicating one side of the channel. In this context, red is more closely associated with the boundaries than any other option.