R651-219-1. Sound Producing Device

(1) Vessels 16 feet to less than 40 feet in length shall have on board a means of making an efficient sound, horn or whistle, capable of a four-to-six-second blast.

(2) Vessels 40 feet and greater in length shall have on board a horn or whistle and a bell. The horn or whistle shall be capable of a four-to-six-second blast and audible for one-half mile. The bell shall be designed to give a clear tone.