In a press release dated 28 September 2018, ClassNK advises existing ships to install ballast water management (BWM) systems early on. An analysis of the retrofitting status of its registered ships confirms that, as of the end of August 2018: -a total of 7,315 ships in ClassNK’s register are...
https://www.hellenicshippingnews.com/do-not-wait-too-long-before-installing-bwm-systems/