Mufflers and Noise Level Limits

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

• The exhaust of every internal combustion engine on any vessel must be muffled effectively. That is, the engine’s exhaust must be muffled or suppressed at all times so as not to create excessive noise.
• It is unlawful to operate a vessel that exceeds a noise level of 90 decibels when subjected to a stationary sound level test or 75 decibels when in operation on state waters.