To comply with Navigation Rules and for distress signaling purposes all boats must carry a sound producing device (whistle, horn, siren, etc.) capable of a 4-second blast audible for ½ mile. *Boats larger than 39.4 ft. are also required to have a bell (see Navigation Rules.)
*Under a recent change, a vessel 12 meters (39.4 ft) to less than 20 meters (65 ft) is no longer required to carry a bell on board.
The Coast Guard said: "The bottom-line, a bell is no longer required on a vessel less than 20 meters in length. That of course means a bell is not required for those same vessels for successful completion of a VSC."