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Course Outline

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. For example, sound signals are required when meeting head-on, crossing, and overtaking. Sound-producing devices must be capable of producing a blast that lasts at least two seconds.

These requirements apply to vessels operating on Wyoming state waters.

  • Vessels less than 26 feet long, which includes PWC, are required to carry on board a hand-, mouth-, or power-operated sound-producing device that is audible for at least one-half mile.
  • Vessels 26 feet to 40 feet long are required to carry on board a hand- or power-operated sound-producing device that is audible for at least one mile.
  • Vessels 40 feet to 65 feet in length are required to carry on board a power-operated sound-producing device that is audible for at least one mile.

These requirements apply to vessels operating on federally controlled 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.
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