BOTH INTERNATIONAL & INLAND A vessel aground at night is required to show two red lights in a vertical line as well as __________.

Correct Answer: Option C — anchor lights

Per Rule 30(d), a vessel aground must exhibit two all-round red lights in a vertical line by night, plus the forward and after anchor lights prescribed in paragraphs (a) and (b) depending on her length, warning approaching traffic of her immobile hazard status.