What are two kinds of near-shore currents?

1. Rip currents: These are powerful, narrow currents of water that flow away from the shore. They can be very dangerous for swimmers, as they can quickly carry people out to sea. Rip currents typically occur near jetties, piers, and other structures that break up the waves.

2. Longshore currents: These are currents that flow parallel to the shore. They are caused by waves breaking at an angle to the beach. Longshore currents can be strong, and they can carry sediment and debris along the coast.