after the 1933 hurricane carved out a tidal channel through the barrier island just south of ocean city, the army corps of engineers constructed a pair of jetties on each side of the inlet to keep it open. these are labeled post-1933 jetty on fig. 15.7. sand filled in behind the northern jetty, so it is now a seawall forming the straight southern edge of ocean city on fenwick island. based on this information, would you say that the longshore current along this coastline is traveling north to south or south to north? explain your reasoning.