Management server in ship navigation assistance system, ship navigation assistance method, and ship navigation assistance program

The invention provides a navigation support for a small ship, which can clearly draw radar images. A management server in a ship navigation assistance system is provided with: a communication means for transmitting and receiving data via a network to and from a user terminal connected to a target detection device; and a vertex information management unit that identifies, as a set of moving vertices among a plurality of vertices of the target extracted on the basis of the detection result information of the target, as belonging to the same target, and that performs vertex information management on the basis of the vertices identified as belonging to the same target. The communication unit sends an instruction to the user terminal to cause it to display a summary of the contour of the target. 本发明提供一种能够清晰地绘制雷达图像的小型船舶的航行辅助。一种船舶的航行辅助系统中的管理服务器，其中，所述管理服务器具备：通信单元，其在与用户终端之间经由网络进行数据的收发，该用户终端与目标的探测装置连接；以及顶点信息管理单元，其将基于所述目标的探测结果信息提取出的目标的多个顶点中作为一组移动的顶点识别为属于同一目标，基于识别为属于所述同一目标的顶点，所述通信单元向所述用户终端发送指示以使其显示所述目标的轮廓的概要。