Cal. Penal Code § 192.5

Vehicular manslaughter pursuant to subdivision (b) of Section 191.5 and subdivision (c) of Section 192 is the unlawful killing of a human being without malice aforethought, and includes: (a) Operating a vessel in violation of subdivision (b), (c), (d), (e), or (f) of Section 655 of the Harbors and Navigation Code, and in the commission of an unlawful act, not amounting to felony, and with gross negligence; or operating a vessel in violation of subdivision (b), (c), (d), (e), or (f) of Section 655 of the Harbors and Navigation Code, and in the commission of a lawful act that might produce death, in an unlawful manner, and with gross negligence. (b) Operating a vessel in violation of subdivision (b), (c), (d), (e), or (f) of Section 655 of the Harbors and Navigation Code, and in the commission of an unlawful act, not amounting to felony, but without gross negligence; or operating a vessel in violation of subdivision (b), (c), (d), (e), or (f) of Section 655 of the Harbors and Navigation Code, and in the commission of a lawful act that might produce death, in an unlawful manner, but without gross negligence. (c) Operating a vessel in the commission of an unlawful act, not amounting to a felony, and with gross negligence; or operating a vessel in the commission of a lawful act that might produce death, in an unlawful manner, and with gross negligence. (d) Operating a vessel in the commission of an unlawful act, not amounting to a felony, but without gross negligence; or operating a vessel in the commission of a lawful act that might produce death, in an unlawful manner, but without gross negligence. (e) A person who flees the scene of the crime after committing a violation of subdivision (a), (b), or (c), upon conviction, in addition and consecutive to the punishment prescribed, shall be punished by an additional term of imprisonment of five years in the state prison. This additional term shall not be imposed unless the allegation is charged in the accusatory pleading and admitted by the defendant or found to be true by the trier of fact. The court shall not strike a finding that brings a person within the provisions of this subdivision or an allegation made pursuant to this subdivision.