Exxon Shipping Company was renamed Sea River Shipping Company. The Exxon Valdez was repaired and renamed the Sea River Mediterranean and is used to haul oil across the Atlantic. The ship is prohibited by law from returning to Prince William Sound.The oil spilled are caused by 

1. The failure of the third mate to properly maneuver the vessel, possibly due to fatigue and excessive workload;
2. The failure of the master to provide a proper navigation watch, possibly due to impairment from alcohol;
3. The failure of Exxon Shipping Company to supervise the master and provide a rested and sufficient crew for the Exxon Valdez
4. The failure of the U.S. Coast Guard to provide an effective vessel traffic system
5. The lack of effective pilot and escort services.