Abstract
The following quote was obtained by the news editors from the background informa tion supplied bythe inventors: “In general, since ships are operated in a state having a lower part of the hull submergedin seawater, foreign substances such as various contaminants or various aquatic organisms such as watermoss and barn acles may be attached to the bottom or side surface located in the water.“The various foreign substances and aquatic organisms attached to the hull not o nly damage theappearance of the ship, but also act as resistance when the ship is operating and become a factor loweringthe speed of the ship, thus greatly in creasing fuel consumption of the ship. Accordingly, it is very importantto clea n the various foreign substances and aquatic organisms attached to the surface p eriodically.
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