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Course Outline

Vessel operators may not hear sound signals or voices if the engine is not adequately muffled.

  • All vessel engines must be equipped with an efficient muffler, underwater exhaust, or other effective muffling device that prevents excessive or unusual noise.
  • A vessel operating on Arizona’s public waters must not exceed any of the following noise levels:
    • A noise level of 86 dBA when the sound level is measured at 50 feet or more from the vessel
    • For an engine manufactured before January 1, 1993, a noise level of 90 dBA when the stationary sound level test (SAE J-2005) is performed
    • For an engine manufactured on or after January 1, 1993, a noise level of 88 dBA when the stationary sound level test (SAE J-2005) is performed
    • A noise level of 75 dBA when the shoreline sound level test (SAE J-1970) is performed
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  • Topic 8 of 19
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