An ocean current is a continuous, directed movement of seawater generated by forces acting upon this mean flow, such as breaking waves, wind, the Coriolis effect, cabbeling, temperature and salinity differences, while tides are caused by the gravitational pull of the Sun and Moon.
RDDs - Radar Detector Detectors, All Acronyms, viewed April 15, 2017, <https://www.allacronyms.com/RDDS/Radar_Detector_Detectors>.
Reactive attachment disorder (RAD) is a complex, severe, and relatively uncommon condition in which infants and young children do not establish lasting, healthy bonds with parents or caregivers. While this condition is rare, it is serious. In many cases a child with RAD has been the victim of abuse, neglect, or abandonment or is orphaned.