ClassNK urges early fitment of ballast treatment systems

ClassNK urges early fitment of ballast treatment systems

Malcolm Latarche

Malcolm Latarche · 01 October 2018


Following an analysis of the retrofitting status of ships entered in its books, ClassNK has confirmed that the installation deadlines for many of them are highly concentrated in the year 2022. As a consequence, the Japanese class society warns that difficulties can be expected in the installation of systems if everyone around the world waits until 2022 and is recommending early installation.

As of the end of August 2018, there are 7,315 ships on the ClassNK register that are obligated to install systems in compliance with the 2004 Convention. Of this amount, 1,915 ships have completed the installation, leaving 5,400 ships that still require attention.


The distribution of installation deadlines in line with the Convention for ClassNk ships is as follows: 92 ships by 2019, 662 ships by 2020, 795 ships by 2021, 2,832 ships by 2022, 558 ships by 2023, and 461 ships by 2024, with the majority being highly concentrated in 2022. The peak figure for 2022 may decrease due to the influence of ship recycling trends and response to USCG regulations.

ClassNK says it is ready to continue providing extensive support to all clients for challenges related to the retrofitting of systems.

ShipInsight suggests that although the advice is valid, many owners may be waiting for more systems to be approved under the revised G8 guidelines now contained in the IMO Code for approval of ballast water management systems adopted at MEPC 72 in April this year. The Code requires that systems installed on ships on or after 28 October 2020 should be approved taking into account the revised guidelines. Systems installed prior to that date could be approved using the existing guidelines or the revised guidelines. So far only one system maker has confirmed it has received type-approval under the new guidelines.

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