With a light layer of small calcareous growth (barnacles or tubeworms), an average length container ship can see an increase in GHG emissions of up to 55%, dependent on ship characteristics and speed. More severe biofouling conditions can lead to higher emissions, showing the importance of good biofouling management. Maintaining a smooth and clean hull free from biofouling is of paramount importance. One of the most significant factors impacting the efficiency of all ships in service is associated with the resistance generated by the underwater area. The preliminary findings of the study on the Impact of Ships’ Biofouling on Greenhouse Gas Emissions reveals that a layer of slime as thin as 0.5 mm covering up to 50% of a hull surface can trigger an increase of GHG emissions in the range of 20 to 25%, depending on ship characteristics, speed and other prevailing conditions.īiofouling is the build-up of microorganisms, plants, algae or small animals on surfaces. Keeping ships’ hulls free from just a thin layer of slime can reduce a ship’s GHG emissions by up to 25 per cent, according to the preliminary findings of a new study, launched at COP 26 (4 November).ĭownload the Preliminary results Impact of Ships’ Biofouling on Greenhouse Gas Emissions report here.
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