According to the Navigation Rules, what must be aboard a 22-foot powerboat?

A 22-foot powerboat must have a horn or whistle aboard as part of the Navigation Rules. This requirement is crucial for maintaining safety on the water, as sound signals are often used to communicate intentions between boats, especially in situations where visibility may be limited or in restricted waters. A horn or whistle can signal other vessels when a powerboat is changing course, overtaking another vessel, or warning of potential hazards.

While having reflective safety gear, a fire extinguisher, and a first-aid kit are all important for boat safety, the requirement for a horn or whistle specifically addresses the need for effective communication in navigation. This is essential for preventing collisions and ensuring all operators are aware of each other's maneuvers, making the horn or whistle a critical component of safe boating practices.