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Just-in-time sailing saves CO2

If sea-going vessels were better informed about the availability of berths and adapted their speed accordingly,

substantial savings could be made in terms of fuel and CO2 emissions, according to a new study commissioned by the Port of Rotterdam Authority and research institute TNO.


TNO and the Port of Rotterdam Authority, which is a member of the ‘Global Industry Alliance to support low carbon shipping’, analysed all the movements of container ships sailing to Rotterdam port in 2017. “By supplying more accurate information to ships, 4% – or 134,000 tonnes – of CO2 emissions can be saved every year,” explains Jan Hulskotte, Senior Researcher at TNO. “To do this, container ships would have to adjust their sailing speed by an average of 5%, and still arrive at the planned arrival time. And even more savings could be made if ships were better informed more than twelve hours before arrival.”ess of arranging its orderly withdrawal from the physical supply market in Singapore in conjunction with the Maritime and Port Authority of Singapore (MPA) and its barging and cargo partners in the market.


The results of the study were presented at IMO during a meeting of the IMO Intersessional working group on the reduction of Greenhouse Gas emissions from ships

“In percentage terms, we’re talking about modest amounts,” says Astrid Dispert, Technical Adviser of the GloMEEP (Global Maritime Energy Efficiency Partnerships) Project. “But it’s exactly these types of measures that can make a huge difference in the short term and help reduce the carbon footprint of marine shipping. Added to that, they’d also have a beneficial effect on the wallets of the shipping companies.”


The study also examined the impact of shorter waiting times in anchorage areas for all ships sailing to Rotterdam. In the bulk transport sector, ships sometimes have to wait at anchor for hours or even days; mainly due to contractual obligations. Hulskotte: “If this waiting time was an average of 12 hours shorter, that would really make a difference in percentage terms, with an annual reduction of 35% in emissions. So we’re talking about 188,000 tonnes of CO2 and 1,000 tonnes of nitrous oxides.”

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