BOTH INTERNATIONAL & INLAND Which display of lights shown in illustration D072RR below indicates a dredge underway and not dredging?

Correct Answer: Option B — B

Rule 23 dictates the lights for a power-driven vessel underway. When a dredge is underway but not actively engaged in dredging operations, she is not restricted in her ability to maneuver and must display standard power-driven vessel navigation lights, shown in diagram B.