BOTH INTERNATIONAL & INLAND A vessel aground at night is required to show two red lights in a vertical line in addition to which lights?

Correct Answer: Option B — anchor lights

Rule 30 requires a vessel aground to display the lights prescribed in Rule 27(d)(i) for a vessel restricted in her ability to maneuver (two red lights vertically), in addition to the anchor lights required by Rule 30(a) or (b) to indicate her presence to other traffic.