RV Oceanus is a Regional Class research vessel owned by the National Science Foundation. The ship was delivered to the Woods Hole Oceanographic Institution (WHOI) for operation as a part of the University-National Oceanographic Laboratory System (UNOLS) fleet in November, 1975. Oceanus made her first operational cruise in April, 1976 and operated under WHOI for thirty-six years in the Atlantic with some operations in the Mediterranean and Caribbean. The ship was scheduled to be retired in November 2011 but instead was transferred to Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, for operation, replacing her sister ship, R/V Wecoma.