Requirements to Have Sound-Producing 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. All vessels on state and federally controlled waters must have a sound-producing device to communicate. The sound-producing device must be capable of producing a short blast that is about one second in duration and a prolonged blast that is four to six seconds in duration.

Use this chart to determine the sound-producing devices required for your vessel.