BOTH INTERNATIONAL & INLAND A vessel is displaying ONLY the lights shown in illustration D061RR below. Which vessel is this?

Correct Answer: Option C — a pilot vessel at anchor

Rule 30(d) specifies that a pilot vessel at anchor shall exhibit the lights prescribed for a pilot vessel underway (white over red) plus the anchor light. This combination identifies the vessel's specific function as a pilot boat while simultaneously signaling its status as a vessel at anchor to other traffic.