BOTH INTERNATIONAL & INLAND At night, a vessel displaying the lights shown in illustration D052RR below represents which of the following?

Correct Answer: Option B — a vessel underway

Rule 23 and Rule 27 govern the display of underway lights. Illustration D052RR shows a vessel displaying running lights (sidelights and masthead lights) alongside specific task lights, indicating that the vessel is underway and making way through the water rather than being anchored or aground.