Swish and Spit for Ships

  • Entry to a ballast tank in a ship's cargo hold.(Photo courtesy of the Great Lakes NOBOB Team)

New research supports the practice of “swish and spit” for ocean-going ships. As Mark
Brush reports – the practice of rinsing ballast tanks with ocean salt water will help stop
aquatic pests from getting into US harbors:

Transcript

New research supports the practice of “swish and spit” for ocean-going ships. As Mark
Brush reports – the practice of rinsing ballast tanks with ocean salt water will help stop
aquatic pests from getting into US harbors:


Aquatic invasive species cause billions of dollars in damage every year. Many hitchhike
here from foreign ports in the ballast tanks of cargo ships. And even when ships declare that
they have no ballast on board – the ballast tanks still have muck in the bottom where
invasive species hide.


David Reid is with the Great Lakes Environmental Research Lab. He says their research supports the idea that all ships should rinse out the tanks during their journey across the ocean:


“That’s why we call it swish and spit. From the point of view of the ballast tank, it’s
very similar to doing a mouthwash. You’re taking in a little bit of fluid, sloshing it around, and spitting it – or in this case pumping it out.”


Reid says the practice doesn’t get rid of every creature lurking in ballast tanks, but it’s
better than doing nothing at all. Right now, the US does not require swish and spit for
ships that declare no ballast on board.


For the Environment Report, I’m Mark Brush.

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Comments Sought on Navigation Study

The U.S. Army Corps of Engineers and the Canadian Department of Transportation are studying the navigational system in the Great Lakes and along the Saint Lawrence River. As the Great Lakes Radio Consortium’s Celeste Headlee reports, the groups are holding public hearings on the issue this summer:

Transcript

The U.S. Army Corps of Engineers and the Canadian Department of
Transportation are studying the navigational system in the Great Lakes and along the
Saint Lawrence River. As the Great Lakes Radio Consortium’s Celeste Headlee reports,
the groups are holding public hearings on the issue this summer:


The study will evaluate current conditions in the Great Lakes and determine what is
required to maintain the navigational routes at the existing size and capacity.


Tim Eder is the director of Water Resources for National Wildlife
Federation. He says any plans for Great Lakes navigation must address current problems
of invasive species and habitat destruction, not make them worse. Eder says only a
handful of ships come in from foreign ports on a daily basis…


“But each ship brings with it the risk of another invasive species and right now, our
fishery in the Great Lakes region is teetering on the brink of collapse because of zebra
mussels, because of sea lampreys, because of Asian carp that are knocking on the door
trying to get into the Great Lakes… most of which, not all, but most of which come in the
ballast tanks of ships from foreign ports.”


The public hearings are being held at various locations through July 14th.


For the Great Lakes Radio Consortium, I’m Celeste Headlee.

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