INLAND ONLY At night, you see the lights shown in illustration D075RR below. These lights are shown by what type of vessel?

Correct Answer: Option B — tug pushing a barge ahead

Illustration D075RR shows a vessel displaying two masthead lights in a vertical line, sidelights, and a stern light. Under 33 CFR 83.24 (Rule 24), this configuration identifies a power-driven vessel pushing a barge ahead, as the lights indicate the vessel is engaged in towing.