US obstacle for ballast water will be gone by November
![Photo: Wärtsilä](https://photos.watchmedier.dk/watchmedier/resize:fill:3840:0:0/plain/https://photos.watchmedier.dk/Images/article6339060.ece/ALTERNATES/schema-16_9/W%25C3%25A4rtsil%25C3%25A4.jpg)
The lack of US type approval for ballast water management systems was the fly in the ointment when the IMO recently announced that the ballast water convention will come into force in September next year.
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