大东港位于我国海岸线的最北端,港址处在鸭绿江曰西侧老西水道的下端湾内。四十多年前的西水道为鸭绿江一支主流,是丹东港(老港)的出海主航道。据历史资料记载。二十～三十年代间,老西航道可进出一千五百吨级船舶;五十年代初,亦可进出千吨级船舶。三十年代末,日本人所拟建的“大东港”港址就选择在这条航道的中部——赵氏沟附近。据记载,当时这里常年保持最低潮位下7米左右的深度,几乎不变。 Dadonggang is located at the northernmost point of China’s coastline, and its site is at the lower end of the Laoxi Channel on the west side of the Yalu River. The West Water Channel more than 40 years ago was the mainstream of the Yalu River and the main waterway to the sea of ​​Dandong Port (Old Port). According to historical records. Between the twenties and thirties, the Old West Channel can go in and out of a 1,500-ton class ship; in the early 1950s, it can also enter and leave the 1,000-ton class ships. In the late 1930s, the “Dadonggang” Hong Kong proposed by the Japanese had chosen to be in the middle of the fairway - Zhao’s ditch. According to records, at that time, the depth of about 7 meters below the lowest tide level was maintained at that time, almost unchanged.