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

Answer: A — Any vessel equipped with oars or sails

The correct answer identifies a vessel that relies on alternative forms of propulsion rather than engine power. Vessels equipped with oars or sails are classified as non-power-driven vessels because they do not use a motorized engine for navigation. These types of vessels include small boats, sailboats, and traditional rowboats, which operate primarily through human power or wind. In contrast, other choices in the question refer to vessels that utilize engine power or are designed for operation with mechanical assistance. A vessel with an engine is classified as power-driven due to its reliance on motor propulsion. Similarly, a vessel that operates with a crew or a cargo ship using engine power falls under the category of power-driven vessels, as they depend on an engine to function effectively. Thus, identifying vessels equipped with oars or sails as not being power-driven is grounded in the definitions established in the COLREGs, which differentiate based on the method of propulsion used.