A muffler must be used on a powerboat to minimize noise pollution and comply with local noise ordinances or regulations. Additionally, it helps reduce engine noise to enhance the onboard experience and avoid disturbing wildlife or other boaters. In many jurisdictions, using a muffler is also a legal requirement for safety and environmental reasons.
A muffler system must be installed in a powerboat to prevent excessive or unusual noise.
muffler system
muffler
the powerboat must yeild to the sail boat
A white masthead light must be shown when a powerboat is operating at night.
P.B. "B" is the give way vessel to P.B. "B" who is the stand on vessel. "A" must not impede "B".
A whistle or horn.
A sailboar with its engine engages
A sailboat with its engine engaged
A sailboar with its engine engages
A whistle or horn
A whistle or horn. (Ref: Eq-38)