What sound-producing device is required on a boat over 16 feet in length?

A boat over 16 feet in length is required to have a sound-producing device, which can be a whistle, horn, or another suitable means of making an audible sound. The specific requirement for a sound-producing device is important for safety, as it allows boaters to signal their presence and intentions to other vessels, especially in situations where visibility is poor.

Using a whistle or horn can ensure that warnings or navigational signals can be communicated effectively across distances where voices would not carry, thus enhancing safety on the water. This requirement plays a critical role in preventing collisions and ensuring that all boaters are aware of one another's movements.

Alternative options, such as using only an air horn, do not meet the regulation since a variety of devices are accepted to provide flexibility for boat owners based on what is available or preferred. Additionally, having no sound-producing device at all would be insufficient and against safety regulations, especially on larger vessels where sound communication becomes more necessary.