TITLE 46 - US CODE - SUBCHAPTER VII - OCEANOGRAPHIC RESEARCH VESSELS

46 USC Appendix 441 - Exemption of oceanographic research vessels from inspection laws; definitions

As used in this subchapter
(1) the term oceanographic research vessel means a vessel which the Secretary of the department in which the Coast Guard is operating finds is being employed exclusively in instruction in oceanography or limnology, or both, or exclusively in oceanographic research, including, but not limited to, such studies pertaining to the sea as seismic, gravity meter and magnetic exploration and other marine geophysical or geological surveys, atmospheric research, and biological research;
(2) the term scientific personnel means persons who are aboard a vessel solely for the purpose of engaging in scientific research, instructing, or receiving instruction, in oceanography or limnology.

46 USC Appendix 443 - Vessel not engaged in trade or commerce

An oceanographic research vessel shall not be deemed to be engaged in trade or commerce.

46 USC Appendix 444 - Scientific personnel not considered seamen

Scientific personnel on an oceanographic research vessel shall not be considered seamen under the provisions of title 53 of the Revised Statutes and Act[1] amendatory thereof or supplementary thereto.
[1] So in original. Probably should be “Acts”.