BOTH INTERNATIONAL & INLAND What shape shall a vessel 15 meters in length, proceeding under sail as well as being propelled by machinery, exhibit?

Correct Answer: Option C — a cone with its apex downward

Rule 25(e) requires a vessel proceeding under sail when also being propelled by machinery to exhibit forward, where it can best be seen, a conical shape, apex downward. This informs other vessels that she is a power-driven vessel for the purposes of the Rules.