member of the merchant marine
(4) “member of the merchant marine” means an individual (other than a member of a uniformed service or an individual employed, enrolled, or maintained on the Great Lakes or the inland waterways)— (A) employed as an officer or crew member of a vessel documented under the laws of the United States, or a vessel owned by the United States, or a vessel of foreign-flag registry under charter to or control of the United States; or (B) enrolled with the United States for employment or training for employment, or maintained by the United States for emergency relief service, as an officer or crew member of any such vessel;