A Ship’s Safety Guide: The Real Importance Of Marine Growth Preventive Systems

Seawater contains various marine organisms


Seawater contains various marine organisms, which enter the ship along with the seawater and lounge and thrive within the parts of the ship’s system. If the marine growth is allowed to stay on these areas for a long time, it can potentially damage parts of the ship’s system. Therefore, preventive measures should be taken to ensure these parts are safe at all times. Many ships use Marine Growth Prevention Systems (MGPS) to fight malicious marine growth that may cause blockages due to bio-fouling.







As the marine growth organisms increase in numbers

Effects of Marine Growth


As the marine growth organisms increase in numbers, they block and narrow the drain area of cooling water inside the ship’s system. Below are some frequently reported problems that many ships experience if the issue isn’t solved up front.

–    Overheating of various water-cooled machinery –    Intense corrosion and thinning of pipes –    Impairment of the heat transfer system –    Low efficiency which can otherwise result in loss of vessel speed and loss of time







To stop the spread of marine growth

How Marine Growth Preventive Systems Work


To stop the spread of marine growth, it’s important to have a strong and reliable MGPS on your ship all the time. This system works by running electrolysis, which requires copper, ferrous, and aluminium sacrificial anode for the MGPS to work. The anodes are fixed together in pairs in the main sea chest area, or in the path where water directly flows through. The system also has a control unit, which drives impressed current to the anodes and renders the same task.



Upon operation, the copper anode produces ions which are swept by water through the machinery and piping system. This solution containing copper is usually strong enough to prevent harmful marine growth from spreading. The impressed current also causes the aluminum and ferrous anode to produce more ions that spread over the system and form a type of anti-corrosive layer. This protective layer spreads over the valves, pipes, refrigeration, heat exchanger and other vital areas for enhanced security. Moreover, the MGPS anodes are fitted with caution and with a specially built safety cap for easy removal of the nodes in an onboard ship.


In summary, Marine Growth Prevention Systems (MGPS) are used to eliminate the harmful effects of macro-fouling that lurk within seawater areas. The fouling menace arises when malicious lower forms of marine life enter and attack the pipe-work systems, hence put the ship’s reputation at greater risk. Seawater lines can block, cooling systems can jam resulting in engine inefficiency and so on. Make sure you have a MGPS onboard to keep ship safe and ensure all ship’s operations go smoothly.