S.D. Codified Laws § 22-16-43
Watercraft homicide--Penalty
Any person who, while under the influence of alcohol, drugs, or substances, in a manner and to a degree prohibited by § 42-8-45 , without design to effect death, operates a boat, as defined by § 42-8-2 , in a negligent manner and thereby causes the death of another person, including an unborn child, is guilty of watercraft homicide, a Class 3 felony.
Source: SL 2025, ch 92, § 1.