423. BOTH INTERNATIONAL & INLAND You are on a sailing vessel. While under sail you decide to use your engine to assist in propulsion. Which of the shapes shown in illustration D016RR below would you exhibit?

A sailing vessel using both sail and engine must exhibit a black cone with its apex pointing downward, as per Navigation Rules Rule 25(e). None of the provided shapes in illustration D016RR correctly depict this signal; therefore, the correct answer is that none of the shapes are correct.