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>.
A residual current device (RCD) is a safety devicethat switches off electricity automatically if thereis a fault. RCDs are far more sensitive thannormal fuses and circuit-breakers and provideadditional protection against electric shock.Additional protection by means of an RCD canbe a lifesaver.An RCD constantly monitors theelectric current flowing along a circuit.n appliance can then be plugged intothe RCD. These are useful when neither fixed norsocket-outlet RCDs are available, but again theyprovide protection only to the person in contactwith the equipment, including the leads,plugged into the portable RCD.