What sound-producing device is acceptable on a vessel greater than 39.4 ft operating on federally controlled waters in Mississippi?

Vessels less than 12 meters (39.4 Feet) long: An efficient sound-producing device, such as an air horn or whistle is required.

Vessels greater than 12 meters (39.4 Feet) long: In addition to an airhorn or whistle a bell is required.

Unpowered boat operators are required to carry a device capable of sounding a prolonged blast for 4-6 seconds that can be heard by another boat operator in time to avoid a collision.

An athletic coach's whistle is an acceptable sound producing device for unpowered boats. It is unlawful to use a sound producing device on the water under any circumstance except a situation in which assistance is needed because of immediate or potential danger to the persons onboard or it is necessary to attract the attention of another boat.

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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.

Mississippi state law does not require that vessels carry a sound-producing device. However, it is always a good idea to have one on board.

These requirements apply to vessels operating on federally controlled waters, such as Mississippi's coastal waters.

• Vessels less than 39.4 feet (12 meters) in length, which includes PWC, must have some way of making an efficient sound signal. Examples are a handheld air horn, an athletic whistle, an installed horn, etc. A human voice is not acceptable.
• Vessels that are 39.4 feet (12 meters) or more in length must have a sound-producing device that can produce an efficient sound signal. The sound signal should be audible for one-half mile and should last for 4 to 6 seconds.