What type of vessel is not designated as a power-driven vessel?

The correct answer indicates that any vessel equipped with oars or sails is not categorized as a power-driven vessel. According to the COLREGs (International Regulations for Preventing Collisions at Sea), a power-driven vessel is defined specifically as any vessel propelled by machinery. This means that vessels relying solely on wind power, such as sailing ships, or human power, such as rowboats, do not fall under this definition.

In contrast, vessels with engines, like cargo ships or motorboats, are clearly identified as power-driven because they are propelled by mechanical means. Similarly, crewed vessels, regardless of their propulsion method, do not change their classification as long as they are powered by machinery. Therefore, the presence of a crew does not influence whether a vessel is power-driven. Recognizing these distinctions is crucial for understanding navigation rules and ensuring safe operations at sea.