BOTH INTERNATIONAL & INLAND At night, you see a vessel displaying the light shown in illustration D046RR below. Which vessel would exhibit this light?

Correct Answer: Option B — sailing

Rule 25(b) states that a sailing vessel underway may exhibit at or near the top of the mast, where they can best be seen, two all-round lights in a vertical line, the upper being red and the lower green. This configuration identifies the vessel as sailing.