It's the Law: Required Equipment

Sound-Producing Devices    312 IAC 5-13-4

• In periods of reduced visibility or whenever a boat operator needs to signal his or her intentions or position, a sound-producing device is essential. The device may be a whistle, horn, or bell that is audible for one-half mile.
• The following requirements apply to boats operating on Waters of Concurrent Jurisdiction.
  • Vessels less than 65.6 feet in length, which includes PWCs, are required to carry on board a whistle or horn or some other means to make an efficient sound signal audible for at least one-half mile.
  • Vessels that are 65.6 feet or more in length are required to carry on board a whistle or horn, and a bell that are audible for at least one mile