If the preferred channel mark is lighted, what will it display?

The correct answer indicates that if a preferred channel mark is lighted, it will display the top band color with a composite group flashing light. This means that the light on the preferred channel mark is designed to provide a specific visual cue to mariners about the direction of safe navigation. The use of a composite group flashing light typically involves a sequence of flashes that helps distinguish it from other navigation lights, as well as indicating the significance of the mark.

Preferred channel marks, which are often designated by a specific color (usually green), are used to indicate which side of a channel should be navigated on. The composite group flash enhances the visibility and recognition of the mark, aiding in safe passage through waterways. Understanding the characteristics of navigational aids, including light patterns, is crucial for safe maritime navigation, as they convey important information about navigating hazards and channel directions.