Question 824 Rules of the Road

The correct answer is D) a black cone. According to the International and Inland Navigation Rules, a vessel that is both under sail and under power must display a black cone with the point downwards in addition to the regular sailing vessel lights and shapes. This indicates that the vessel is propelled by machinery in addition to sail power. The other answer choices are incorrect because they do not represent the proper shape that must be displayed by a sailing vessel that is also propelled by machinery during the daytime. A black ball, two black cones, or a basket are not the correct daytime shape for this situation.