为准确客观地揭示开阔水域通航分道附近船舶领域与船型和船舶尺度的关系，首先，提出一种基于船舶AIS 数据确定船舶领域边界的方法，即利用大量AIS数据计算船舶间的相对位置关系，并将不同时空船舶间的相对位置关系叠加，以此反映中心船周围他船的分布情况；其次，设计船舶领域分析集成平台，结合周围船舶分布情况，利用最小二乘法拟合领域边界，得出研究水域船舶领域；最后，以某分道通航水域为例，研究主要船型的船舶领域。结果表明：开阔水域通航分道处船舶领域近似椭圆型，与藤井船舶领域模型类似；船舶领域与船舶尺度和船型有关，随船舶尺度的增大而增大，同尺度货船领域小于油船领域，领域长轴较短轴随船长增加更明显。

In order to accurately and objectively reveal the relationship between ship domain, ship type and ship size near traffic lanes of open water, a method to determine ship domain boundary based on ship automatic identification system (AIS) data was proposed  firstly, i.e., a large amount of AIS data was used to calculate the relative position relationship between ships, and the relative position relationship between ships in different time and space was stacked together. In this way, the distribution of other ships around the center ship is reflected. Secondly, an integrated platform of ship domain analysis was designed, and by combining with the distribution of surrounding ships, the least square method was used to fit the domain boundary, and the ship domain in the study area was obtained. Finally, taking certain traffic lane water as an example, the ship domain of the main ship types were studied. Results show that the ship domain in traffic lane of open water is near elliptic, which is similar to the Fujii ship domain model. The ship domain is related to ship size and ship type,  and increases with the increase of ship size.  in the same size, cargo ship domain is smaller than oil tanker, and the long axis of domain is more significant than the short axis as the length increases.