At the intersection of wage-and-hour and maritime law are the FLSA’s “seaman” exemptions: the exemption from minimum wage and overtime codified at 29 U.S.C. § 213(a)(12) and the overtime exemption codified at 29 U.S.C. § 213(b)(6). These exemptions often are confused or collapsed with the definition of a “seaman” for purposes of the Jones Act, separate federal legislation