What is legal sound device for vessel less than 65 feet?

For vessels less than 65 feet, a legal sound device typically includes a whistle, horn, or bell that can produce a sound signal audible for at least half a mile. The specific requirements may vary by jurisdiction, but generally, a handheld air horn or an electric horn is acceptable. It's important for boaters to ensure that their sound signaling device is in good working condition and readily accessible for use in case of emergencies. Always check local regulations for any specific requirements.