长江南京大桥以下至吴淞口(345公里),具有万吨级海轮进江实现江海直达运输的优越航道条件,除少数门坎滩外,其余航道水深均在10米(航行基准面下)以上,1～2.5万吨级海轮可以终年通航。自从1966年开放海轮进江以来,位于长江口门上的由长江航道局管辖的白茆沙、通州沙水道(再以下浅滩由 Yangtze River Nanjing Bridge to the following Wusongkou (345 km), with 10,000-ton seagoing sea into the river to achieve direct sea transport conditions of the fairway, with a few threshold outside the beach, the remaining waterways are at a depth of 10 meters (sailing datum) above, 1 ~ 25000-ton seagoing vessels can be year-round navigation. Since the launching of the seagoing vessels into the river in 1966, the Baijisha and Tongzhou Sha waterways, which are under the jurisdiction of the Changjiang Waterway Bureau at the mouth of the Yangtze River