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

  • All vessels manufactured after January 1, 1990, operating on Maryland waters must be equipped with a muffler system in good working order and in constant operation to suppress engine noise.
  • You may not remove or modify a muffler or muffling system if the result is an increase in noise level.
  • No person may operate a vessel that emits noise in excess of 90 dB(A) on Maryland waters.
  • Vessels involved in a marine event approved by the USCG or the MDNR are exempt from the requirements above.
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  • Topic 8 of 20
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