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Sea trial results of ClassNK-NAPA GREEN on box ship

ClassNK and NAPA today report that a K-Line containership which tested their voyage optimisation software saved almost 4 per cent of fuel.

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Sea trials took place in January, two months before the Japanese classification society acquired the Finnish software house.

An 8,000+ TEU vessel operating on a Mediterranean/Europe route used the ClassNK-NAPA GREEN suite of systems, including speed, trim, and voyage optimisation.

ClassNK and NAPA report that the eco efficiency software generated fuel savings of 3.9 per cent. They calculated that speed profile and voyage optimisation reduced the fuel consumption by 2.7 per cent, while a further 1.2 per cent savings was attributed to optimum trim.

“The results of ClassNK-NAPA GREEN’s full-scale voyage optimisation trials mark a landmark in the development of operational efficiency software,” said executive vice president Esa Henttinen from NAPA. “If K-Line can save 4 per cent in fuel costs for one vessel alone then the potential savings across its entire fleet is significant.”

“Although software solutions to optimise fuel consumption are nothing new, the differentiating factor for ClassNK-NAPA GREEN is the software’s Dynamic Performance Model. It tunes the ship specific performance model on a continuous basis to give very accurate, transparent and true performance statistics to improve voyage optimisation, trim optimisation and performance reporting with payback on investment realised within months."

Representative director & executive vice president Yasushi Nakamura from ClassNK added: “After 18 months of development, to have achieved this amount of savings at this stage in the project is an exciting milestone of particular significance to the container sector, which operates at higher speeds and is therefore more sensitive to speed and trim optimisation than slower vessels.”

Container owners and operators Wan Hai Lines and Shoei Kisen are also implementing ClassNK-NAPA GREEN. And Finnish operator Bore is currently installing the system on its Ro-Ro vessels.

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