BOTH INTERNATIONAL & INLAND Which shape shall a 22-meter sailing vessel exhibit when it is being propelled by machinery during daylight hours?

Correct Answer: Option D — black cone

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