Dredging

The other week we met a man who sells ‘ballast water management systems’ to shipping operators.

A challenge with global shipping, he told us, is that big vessels tend to dredge a lot of marine biology into their ballast tanks as they cross the world’s oceans. This means ships can easily introduce invasive species to new areas when they dump their ballast before docking.

I said I hadn’t really imagined this could be a thing, and that it sounded like interesting work. The salesman smiled and told us that because all this stuff happens beneath the surface – because you can’t see it – people just don’t think about it. ‘But the pump pipes have openings like this,’ he said, and held his arms out wide. ‘And the tanks can hold a lot of creatures.’

I asked him if they simply put a mesh on the inlets, or installed some kind of filtration equipment.

‘No,’ he said, and paused. ‘We just kill everything with chemicals.’

The conversation fizzled a bit after that. But I did come away with a reminder that you can find science fiction in almost anything.

Anyway: happy new year!

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