46 C.F.R. § 3.05-3 Oceanographic research vessel.
Title 46 - Shipping
“An oceanographic research vessel is a vessel which the U.S. Coast Guard finds is employed exclusively in one or more of the following: (a) Oceanographic instruction; (b) Limnologic instruction; (c) Oceanographic research; or, (d) Limnologic research.”
Title 46: Shipping
PART 3—DESIGNATION OF OCEANOGRAPHIC RESEARCH VESSELS
Subpart 3.05—Definition of Terms Used in This Part
§ 3.05-3 Oceanographic research vessel.