That part of a rip current circulation located in the surf zone, marked by a narrow band of swiftly moving, seaward flowing water. It is here where velocity of the circulation is at a maximum, and where most rip current drowning deaths occur.
National Oceanic and Atmospheric Administration's NOAA, Glossary of Some Terms Related to Rip Currents, U.S. Department of Commerce, Office of Climate, Water, and Weather Services, Silver Spring, MD, USA 2012. http://www.srh.noaa.gov/ripcurrents/glossary.shtml , (ND/ Rip Currents - Amer) {835}