ABS

Recent ship detentions occurred in certain ports in the Tokyo MoU concerning ballast water management system (BWMS) arrangements and associated valves.

The PSC deficiency typically states that the piping arrangement of the ballast water management system may permit the system to be bypassed during ballast uptake and discharge operations without activating an alarm. The most recent PSC cases reference Section 7 of the BWMS Code (IMO Resolution MEPC.300(72)) while older cases have not provided a citation.

ww2.eagle.org/content/dam/eagle/regulatory-news/2026/regulatory-news-potential-bwms-bypass.pdf