BOTH INTERNATIONAL & INLAND Which vessel is required to show a yellow light over a white light at night?

Correct Answer: Option B — a vessel towing astern

Rule 24(c) requires a power-driven vessel towing astern to exhibit a yellow towing light in a vertical line above the stern light. This specific light combination is a mandatory identification signal for towing vessels, distinguishing them from other power-driven vessels operating under Rule 23.