In this paper, we describe the design of a system to bundle multiple communication lines and prototyping using small devices. Since the communication line is stable on land, multiple lines can be bundled simply and used. But, communication lines are not always stable on ships. Therefore, it is not possible to simply bundle communication lines on a ship. In the system described in this paper, it is possible to improve the line speed by bundling a plurality of communication lines available at that time. As a result, it possible to increase the network bandwidth between the ship and the land by using a plurality of inexpensive lines, and it is possible to use various uses such as video transmission.