一、前言吕泗近海是指川腰港以南,启东咀以北,东经122°20′以西的广大水域。海岸线略向海凸出,北段为西西北—东东南向,南段偏南北向。岸外是宽阔而平缓的浅滩。北部有与岸线走向极为一致的小庙洪水道,水深较深,最深处可达17米。小庙洪水道西北是面积较大而高的腰沙,一般情况下均露出水面。该海域东部水域开阔,水深为10—15米(见图1)。 I. Introduction Lu Si offshore refers to the vast waters south of Chuan Yao port and north of Qidong Tsui and east of 122 ° 20 ’east. The coastline is slightly convex to the sea, the north section is northwest - east - south - east, while the south section is north - south. The shore is a broad and gentle shoal. In the north there is a small temple flood path that is very much in line with the coastline, with a deep water depth of up to 17 meters. Small temple flood path northwest is larger and taller waist sand, under normal circumstances are exposed surface. The waters east of the open, water depth of 10-15 meters (see Figure 1).