What defines a vessel as a power-driven vessel?

A power-driven vessel is specifically defined as any vessel that is propelled by machinery. This designation includes a wide range of vessels, such as motorboats, ships, and any craft that relies on engines or mechanical means for movement through the water. The key aspect of this definition is the propulsion system—if a vessel uses machinery for its movement rather than relying solely on sails or human power, it falls under this category.

In contrast, other options do not accurately encapsulate the definition of a power-driven vessel. The capability of carrying passengers does not inherently relate to the propulsion method, and thus does not define the vessel type. Similarly, while many vessels used for fishing could be power-driven, not all fishing vessels are propelled by machinery. Lastly, the length of a vessel (over 65 feet) does not determine whether it is power-driven; vessels of various sizes can utilize machinery for propulsion. Therefore, the defining characteristic lies strictly in machinery usage for propulsion, making the definition of a power-driven vessel clear and precise.