What signaling device is mandatory on boats over 16 feet in length?

The requirement for a signaling device on boats over 16 feet in length is crucial for safety and communication on the water. A whistle or horn serves as an effective means of signaling to other vessels, especially in situations where visibility may be low or when communication is necessary for avoiding collisions. This auditory signaling device can alert nearby boaters to your presence and intentions, enhancing overall navigational safety.

Using a bell, while useful in certain circumstances, is not specified as a mandatory signaling device for boats of this size. Mirrors and flare guns serve different purposes; mirrors are typically used for visual signaling or reflection while flare guns serve as emergency distress signaling but are not required as standard signaling devices for everyday navigation. Therefore, having a whistle or horn is an essential safety measure for larger vessels, ensuring compliance with boating regulations and contributing to safer waterway environments.