BOTH INTERNATIONAL & INLAND Which lights is a 15-meter sailing vessel required to show?

Correct Answer: Option D — sidelights, and stern light, but they may be in a combined lantern on the mast

Rule 25(b) permits vessels of less than 20 meters in length to combine their sidelights and stern light into a single lantern carried at or near the top of the mast where it can best be seen, providing a practical lighting solution for smaller sailing craft.