Cal. Harb. and Nav. Code § 654.5
A person who maliciously throws, hurls, or projects an object by manual, mechanical, or other means at a vessel or an occupant of a vessel on any of the waters within or bordering on this state, which act does not constitute a violation of either Section 242 or 594 of the Penal Code, is guilty of a misdemeanor, and upon first conviction the punishment shall be a fine not to exceed one thousand dollars ($1,000) or imprisonment in the county jail not to exceed 30 days, or both that fine and imprisonment. Upon a second conviction, the punishment shall be a fine not to exceed five thousand dollars ($5,000) or imprisonment in the county jail not to exceed 90 days, or both that fine and imprisonment. Upon a third or subsequent conviction, the punishment shall be a fine not to exceed ten thousand dollars ($10,000) or imprisonment in the county jail not to exceed one year, or both that fine and imprisonment.
Ca. Harb. and Nav. Code § 654.5