Mo. Rev. Stat. § 577.025

A person commits the offense of negligent operation of a vessel if when operating a vessel he or she acts with criminal negligence, as defined in subsection 5 of section 562.016, to cause physical injury to any other person or damage to the property of any other person. A person convicted of negligent operation of a vessel is guilty of a class B misdemeanor upon conviction for the first violation, guilty of a class A misdemeanor upon conviction for the second violation, and guilty of a class E felony for conviction for the third and subsequent violations.