Question 114 Rules of the Road

The correct answer is B) dredge pipeline. The flashing yellow lights displayed in illustration D081RR indicate a dredge pipeline, which is a submerged pipeline used for dredging operations. According to the U.S. Coast Guard regulations, vessels engaged in dredging or underwater operations are required to display these flashing yellow lights to warn other vessels in the area of the obstruction. The other answer choices are incorrect because they do not match the visual cue provided in the illustration. A vessel aground would display different lights, a mine clearance vessel would have different signaling requirements, and a vessel not under command would display different configurations of red and white lights.