46 U.S.C. § 2304: Duty to provide assistance at sea

(a)(1) A master or individual in charge of a vessel shall render assistance to any individual found at sea in danger of being lost, so far as the master or individual in charge can do so without serious danger to the master’s or individual’s vessel or individuals on board. (2) Paragraph (1) does not apply to a vessel of war or a vessel owned by the United States Government appropriated only to a public service. (b) A master or individual violating this section shall be fined not more than $1,000, imprisoned for not more than 2 years, or both.