(a)Alien classifiable as crewman. An alien is classifiable as a nonimmigrant crewman upon establishing to the satisfaction of the consular officer the qualifications prescribed by INA 101(a)(15)(D), provided that the alien has permission to enter some foreign country after a temporary landing in the United States, unless the alien is barred from such classification under the provisions of INA 214(f). (b)Alien not classifiable as crewman. An alien employed on board a vessel or aircraft in a capacity