BOTH INTERNATIONAL & INLAND Which vessel would exhibit the lights shown in illustration D056RR below?

Correct Answer: Option B — a vessel dredging while underway

Rule 27(d) requires a vessel engaged in dredging or underwater operations, when restricted in her ability to maneuver, to display the lights for a restricted vessel plus two red lights to indicate the side of the obstruction and two green lights to indicate the side on which another vessel may pass.