What defines a power-driven vessel?

A power-driven vessel is defined as any vessel that is propelled by machinery. This includes vessels equipped with engines, such as motorboats, yachts, and any other type of craft that relies on mechanical means for movement across the water. The definition emphasizes the reliance on mechanical power instead of natural means like wind or current, which is essential for understanding navigation rules and safety regulations.

Considering the context of the other options, vessels propelled solely by sails fall into a different category known as sailboats, which do not meet the criteria for being power-driven. Anchored vessels and those that are adrift also do not fall under this definition, as they are not using machinery to move. Thus, recognizing the characteristics of power-driven vessels is crucial for safe navigation and compliance with boating laws.