在海中,因水压很高,不仅是潜水员,即使利用潜水船进行作业,也经常伴随着危险。而且,人漂浮在黑暗的空间有孤立感的情况下保持精神上的稳定也是困难的。在海中由于急躁以及思考能力降低等原因造成机器操作的失误,往往会导致死亡。因此,为了推进海洋开发,有必要用安全而又适应海中环境的水中机器人代替人类的直接活动。众所周知,已经研制出的用于海洋调查、探索、测量及作业等多方面的有人或无人的机器人,已达到实用化程度。例如,美国的回收用机器人“CURV”和海底油田开发及水下作业机器人“MOBOT” In the sea, because of the high water pressure, it is not only divers, but often dangerous even with diving boats. Moreover, it is also difficult for a person to remain mentally stable while having a sense of isolation in a dark space. In the sea due to impatience and thinking ability to reduce other causes of machine operation errors, often leading to death. Therefore, in order to promote the development of the oceans, it is necessary to replace human direct activities with underwater robots that are safe and adapted to the marine environment. It is well-known that robots, both manned and unmanned, that have been developed for many aspects of marine surveying, exploration, surveying and homework have reached practical levels. For example, the United States recycling robot “CURV” and subsea oilfield development and underwater operations robot “MOBOT”