The IMO Biofouling updated 2023 Guidelines for the control and management of ships’ biofouling were issued by IMO during the summer. These guidelines aim to minimize the transfer of invasive aquatic species by providing a globally consistent approach to managing biofouling, which is the accumulation of aquatic organisms on ships’ hulls. Additionally, the updated guidelines acknowledge that improved biofouling management can also enhance a ship’s hydrodynamic performance, leading to increased energy efficiency and reduced greenhouse gas emissions.
New requirements
The revised guidelines introduced several new topics that were not included in the 2011 edition. These include a fouling rating system with four levels of evaluation ranging from no fouling to heavy macrofouling. The guidelines also incorporate requirements for monitoring installed antifouling systems and marine growth prevention systems, as well as specific risk assessment guidance and sample inspection and cleaning reports. Additionally, there are provisions for a contingency plan to address identified risks, updated requirements for biofouling management plans and records, and the inclusion of electronic record-keeping provisions.
What to be done
To address the new requirements, companies should first review their existing Biofouling Management Plans and Biofouling Record Books. They need to ensure that these documents reflect the implementation of the updated guidelines. Next, companies should check the condition and functionality of the Antifouling Systems, Antifouling Coating, and Marine Growth Prevention systems installed on their ships. They should also implement standardized periods for inspection, cleaning, and restoration of areas affected by biofouling growth, as specified in the revised guidelines.
