If a lighted preferred channel buoy shows a composite group flashing (2+1) light, it will appear in what colors?

A lighted preferred channel buoy that displays a composite group flashing (2+1) light is used to indicate the primary direction of safe passage through a channel. The specific colors associated with this type of buoy are red and green. The red light indicates the port side of the preferred channel, while the green light indicates the starboard side.

In the context of marine navigation, preferred channel buoys are crucial for helping mariners navigate narrower parts of waterways. The red and green lights function as a guide, indicating that vessels should keep the red light to port when proceeding in the direction of safe passage. Understanding the meaning of these colors is essential for safe navigation, especially in areas where multiple navigation aids are present.

The other color combinations do not correspond to the standard navigation rules for preferred channel buoys. Familiarity with these color codes can help avoid confusion on the water and enhance overall navigational safety.