Question 665 Rules of the Road

The correct answer is C) Greatest breadth. The term "breadth" in the context of a vessel's measurements refers to the greatest width of the vessel, measured at the widest point. This is known as the "greatest breadth" and is a key dimension used in determining a vessel's overall size and capacity. This definition applies to both international and inland (domestic) vessels under the US Coast Guard regulations. The other options are incorrect because they refer to more specific measurements, such as the molded breadth, breadth at the uppermost continuous deck, or breadth at the load waterline, which are not the general definition of "breadth" as the greatest overall width of the vessel.