As used in this chapter, unless the context clearly indicates otherwise:

"dB" means the sound pressure level in decibels measured using the "A" weighting network on a sound level meter.

"Commission" means the state parks and recreation commission.

"Muffler" or "muffler system" means a sound suppression device or system, including an underwater exhaust system, designed and installed to abate the sound of exhaust gases emitted from an internal combustion engine and that prevents excessive or unusual noise.

"Operate" means to steer, direct, or otherwise have physical control of a vessel that is underway.

"Operator" means an individual who steers, directs, or otherwise has physical control of a vessel that is underway or exercises actual authority to control the person at the helm.

"Owner" means a person who has a lawful right to possession of a vessel by purchase, exchange, gift, lease, inheritance, or legal action whether or not the vessel is subject to a security interest.

"Sound level meter" means a device which measures sound pressure levels and conforms to Type 1 or Type 2 as specified in the American National Standards Institute (ANSI), Specifications for Sound Level Meters, S1.4-1983.

"Vessel" includes every description of watercraft on the water, other than a seaplane, used or capable of being used as a means of transportation on the water. However, it does not include inner tubes, air mattresses, and small rafts or flotation devices or toys customarily used by swimmers.

"Waters of the state" means any waters within the territorial limits of Washington state.