每天进出美国港口的油轮达数百艘,其他船舶达数千条。这些船舶装载的货物和搭乘的乘客对美国经济十分重要。美国所消耗的石油的一半,对外贸易的90％以上(按重量计)都是由船舶运输的。由此也带来了客、货轮各类事故较为频繁。搁浅、碰撞和触礁等事故占美国海域海上航行事故的大部分,每年造成数10亿美元 Hundreds of oil tankers enter and exit the U.S. ports every day, with thousands of other ships. These ships are loaded with goods and boarding passengers on the United States economy is very important. Half of the oil consumed by the United States and over 90% of foreign trade (by weight) are transported by ship. This also brought a passenger, freighter all kinds of accidents more frequently. Accidents of aggravating, colliding and touching the rocks account for most of the maritime navigation accidents in the United States, causing billions of dollars each year