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Sound Signal Devices

In periods of reduced visibility or whenever a vessel operator needs to signal his or her intentions or position, a sound-producing device is essential. The navigation rules for meeting head-on, crossing and overtaking situations are examples of when sound signals are required.

These requirements apply to vessels operating on Tennessee state waters.

  • Vessels less than 39.4 feet (12 meters) in length, which includes PWC, are not required to carry a whistle or bell but must have some means to make an efficient sound signal.
  • Vessels that are 39.4 feet (12 meters) or more in length are required to carry on board a whistle and a bell.

These requirements apply to vessels operating on federally controlled waters.

  • Vessels less than 65.6 feet (20 meters) in length, which includes PWC, 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 (20 meters) 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.