BOTH INTERNATIONAL & INLAND A sailing vessel is displaying the shape shown in illustration D035RR. What does this shape indicate?

Correct Answer: Option B — the vessel is being propelled by power as well as sail

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 downwards. This visual signal alerts other vessels that the sailboat is a power-driven vessel for the purposes of the Rules.