It consists of a uniquely designed series of air and water nozzles with 2 special swivel units in the vertical and horizontal planes. It is designed to give the highest and strongest solid water jet possible up to about 80 meters with a water pressure of 11 kgf/cm2. It can be easily operated by one man using the normal service mains available on most Bulk carriers and OBO type vessels. It requires a water pressure of 4 kgf/cm2 or more and air pressures of 6 to 8 kgf/cm2 and can simply be connected to the normal water-on-deck line and the service air line. For the toughest cleaning jobs, a water pressure of 11 kgf/cm2 will enable the Maxi-Gun to reach a jet length of about 80 meters, but even at 7 kgf/cm2 the reach is about 60 meters. For safety, the Maxi-Gun incorporates 3 easily mounted water ballast tanks. These form a weighted, self-supporting stand for the nozzle and swivel units. With the ballast tanks full one man can easily and safely operate the equipment from a standing position, controlling jet direction and cleaning pattern from the nozzle handle.