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Jetty: a breakwater constructed to protect or defend a harbor, stretch of coast, or riverbank.
Rip current: a relatively strong, narrow current flowing outward from the beach through the surf zone and presenting a hazard to swimmers.
Rip tide: a strong current caused by tidal flow in confined areas such as inlets and presenting a hazard to swimmers and boaters. A similar but distinct phenomenon often confused for a rip current.
Sandbar: a deposit of sand forming a shallow area in the sea or a river.
Surf zone: the area of the ocean where waves break near the shoreline.
Undertow: a current of water below the surface and moving in a different direction from any surface current. Also distinct from a rip current.
Wave Set Up: elevation of the mean water level at the shoreline due to wave breaking in the surf zone.
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