ClassNK-NAPA green software unlocks significant fuel savings…

IT and Communications, Marine Equipment Products and Services, Shipbuilding and Shipyards, Technology — By on April 10, 2014 at 4:16 AM

ClassNK_NAPA_GREEN_cmyk copyCLASSNK-NAPA green software unlocks significant fuel savings during “K” line full-scale trials

Analysis from software application on 8, 000+ TEU container vessel reveals advanced voyage and trim optimization reduced fuel consumption by around 4% with further savings possible

TOKYO – April 10, 2014: NAPA, the leading global maritime software house, and ClassNK, one of the world’s leading classification societies, today announced that their comprehensive eco efficiency and operational optimization solution ClassNK-NAPA GREEN, has generated fuel savings of 3.9% on a “K” Line (Kawasaki Kisen Kaisha Ltd) container vessel.

The software solution was tested in full scale sea trials in January 2014 aboard an 8, 000+ TEU container ship operating on a standard Mediterranean/Europe route. The full ClassNK-NAPA GREEN suite of systems were utilized on the voyage, including speed, trim, and voyage optimization based on the ClassNK-NAPA GREEN Dynamic Performance Model, and analyzed against the captain’s voyage plan. Despite encountering heavy weather on multiple occasions over the course of the voyage, speed profile and voyage optimization reduced the fuel consumption by 2.7%, while a further 1.2% savings was attributed to optimum trim, taking the total reduction in fuel consumption from the trial to 3.8%.

While trim optimization was restricted on this voyage due to loading conditions, results from a full-scale trim optimization study, conducted during two Indian Ocean crossings aboard the vessel, indicated that trim optimization has the possibility to further save fuel up to 4%.

In addition it was found that the accuracy of Dynamic Performance Model – the self-learning component of ClassNK-NAPA GREEN – was extremely high. In terms of fuel consumption prediction the accuracy was as high as 99.6%, which is unprecedented in the industry.

Executive Vice President Esa Henttinen from NAPA :
“The results of ClassNK-NAPA GREEN’s full-scale voyage optimization trials mark a landmark in the development of operational efficiency software. If “K” Line can save 4% in fuel costs for one vessel alone then the potential savings across its entire fleet is significant. Although software solutions to optimize 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 optimization, trim optimization and performance reporting with payback on investment realized within months. Full-scale proven bunker cost saving are significant and feedback to ship designs will improve newbuilds further. I thank NAPA’s partners “K” Line and ClassNK in helping support the entire maritime industry benefit from our collective work on full-scale verifications.”

Representative Director & Executive Vice President Yasushi Nakamura from ClassNK:
“The fuel savings revealed through the “K Line” ClassNK-NAPA GREEN sea trials demonstrate the incredible environmental and economic benefits that ship designers, operators and charterers can achieve with innovative software solutions like ClassNK-NAPA GREEN. 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 optimization than slower vessels.”

“K” Line is one of many operators realizing greater efficiency in operation through the application of ClassNK-NAPA GREEN, including container owners and operators such as Wan Hai Lines and Shoei Kisen. The Finnish shipping operator Bore is also currently installing the system to its fleet of Ro-Ro vessels, following successful trials onboard the 2, 863lane meter (lm) RoFlex vessels Bore Sea and Bore Song. On these two vessels the system has proven savings between 4 and 6%.

About NAPA

NAPA is the world leading software house supplying solutions for ship design and operation with a mission to improve safety and eco-efficiency of the global maritime industry. With a solid track record in setting new standards for 3D modeling of ships and ship performance analyses, NAPA’s philosophy is that true eco-efficiency starts with the build process and continues through the operational lifecycle of a vessel.

NAPA software are used by shipyards, owners, operators, charterers, designers, classification societies, research institutes, authorities, consultancies and universities. NAPA has 400 user organizations for the design application and nearly 2, 000 installations onboard.

For more information, visit

About ClassNK
ClassNK is one of the world’s leading classification societies, dedicated to supporting the growth and development of the maritime industry, and ensuring the safety of ships, their crews, and the marine environment. With more than 8, 500 vessels on its register, ClassNK provides classification and certification services to more than 20% of the world’s merchant fleet.


Leave a Reply

IMPORTANT! To be able to proceed, you need to solve the following simple math (so we know that you are a human) :-)

What is 12 + 5 ?
Please leave these two fields as-is:


Leave a Trackback