BWT D2 Set to Wipe Out Immigrants in Ballast Water Soon

By George Backwell at January 24, 2011 02:51
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Ballast water provides stability and manoeuvrability to a light ship – it would be an uncomfortable and hazardous voyage without it swilling around down in the ballast water tanks – and it's free, courtesy of Neptune.The trouble is that as cargo goes out, ballast water comes in, usually from coastal or estuary waters teeming with organisms ranging from viruses to crustaceans, even fish and eels bearing no goodwill to the indigenous population and eco-system they end up in. It has been estimated by IMO that international merchant shipping carries the 'gee-whizz' figure of between three and twelve billion tons of ballast water around the world each year, with invasive species causing estimated losses of $138 billion annually to the economy of the U.S.A. alone.The IMO International Convention for the Control and Management of Ship's Ballast Water and Sediments 2004, now within single digits of ratification by the necessary thirty nations, attempts a remedy by making ship-owner... [More]

New Era for Tanker Shipping

By Keith Henderson at December 07, 2010 07:43
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Yesterday in London, the DNV classification society unveiled the Triality VLCC concept vessel. The vessel is fueled by liquified natural gas (LNG), has a special hull shape that does not require the use of ballast water and virtually eliminates harmful exhaust emissions. A further bonus is its attention to the problem of vapors emitted by the cargo and providing a solution to use them. The LNG fuel carried is sufficient for 25 000 nautical miles of operation. The new vee shaped hull with revised cargo tank layout dispenses with the use of ballast water in the empty condition: rendering a higher net efficiency for a round trip. Cargo vapors are collected , liquefied and stored as LPG for later use during the trip. DNV estimate that the capital cost of their new design will be 10-15 per cent more however the through life cost saving will be 25 per cent less than an equivalent VLCC of conventional design. [More]

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