33 CFR § 160.310 - Definitions.
As used in this subpart, and only for purposes of this supbpart -
Acceptable identification means a:
(2) U.S. Permanent Resident Card;
(3) U.S. merchant mariner document;
(4) U.S. merchant mariner credential;
(5) Transportation Worker Identification Credential (TWIC) issued by the Transportation Security Administration under 49 CFR part 1572; or
(6) Seafarer's Identification Document (SID) issued by or under the authority of the government of a country that has ratified the International Labour Organization Seafarers' Identity Documents Convention (Revised), 2003 (ILO 185), meeting all the requirements of ILO 185.
Commercial service means any type of trade or business involving the transportation of goods or individuals, except service performed by a combatant vessel.
Crewmember means all persons carried onboard a vessel to provide: navigation services; maintenance of the vessel, its machinery, or systems; arrangements essential for propulsion or safe navigation; or services for other persons onboard.
Navigable waters of the United States means the same as this term is defined in 33 CFR 2.36(a). This includes a 12-nautical-mile wide U.S. territorial sea as measured from the baseline, U.S. internal waters subject to tidal influence, and certain U.S. internal waters not subject to tidal influence.
Passport means any travel document issued by competent authority showing the bearer's origin, identity, and nationality if any, which is valid for the admission of the bearer into a foreign country.
Port or place of departure means any port or place in which a vessel is anchored or moored.
Port or place of destination means any port or place in which a vessel is bound to anchor or moor.