Method and device for preventing fouling in sea chests and seawater systems on ships, offshore platforms etc.

The invention relates to a method and a device on ships, offshore platforms etc., for the protection of components in complete seawater systems that are sporadically or constantly in open sea chests in contact with seawater, for selectively localized and short-term overheating of the enclosed seawater to to avoid fouling on these components by organisms such as barnacles, mussels, moss animals and their larvae (according to patent DE 19921433.6-22). DOLLAR A of the invention is an advanced, effective process and an extended device for fouling inhibition and prevention based on the entire seawater system in which sea chests, which are arranged each port and starboard and through pipes and / or channels with built-in shut-off valves, pumps operatively connected with a mixing tank are are switched such that the entire seawater system in a passive subsystem - be split and that these subsystems may be selectively localized and briefly thermally overheated - cleaning operation - and in an active subsystem - sea operation.