An offshore ridge or mound which is submerged (at least at high tide), especially at the mouth of a river or estuary, or lying parallel to, and a short distance from, the beach
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}