SUBCHAPTER VII—OCEANOGRAPHIC RESEARCH VESSELS Sec. 441. Exemption of oceanographic research vessels from inspection laws; definitions. 443. Vessel not engaged in trade or commerce. 444. Scientific personnel not considered seamen. SUBCHAPTER VIII—SAILING SCHOOL VESSELS 446. Sailing school students and sailing school instructors without seamen status under steam-vessel and merchant seamen provisions or maritime law doctrines. 446a. Financial responsibility; minimum amount; evidence. 446b. Sailing school vessel without status of merchant vessel or vessel engaged in trade or commerce. 446c. Definitions.