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Incorporating Clean Shipping International


Thursday, November 1, 2018 

ClassNK released has released what it describes as the first software that calculates and analyses a ship’s speed for Energy Efficiency Design Index (EEDI) calculation in compliance with the latest guidelines.

MARPOL Annex VI states one parameter for calculating the EEDI of a ship’s speed in calm sea conditions based on speed trial results. To eliminate the effects of external factors during a sea trial (wind, waves, current, water depth, sea temperature) and provide a way to calculate and analyse a ship’s speed in calm sea conditions, the IMO assigned two methods in its Guidelines (2014 Guidelines on survey and certification of the Energy Efficiency Design Index (EEDI)), namely the ISO 15016:2015 and ITTC 2014 Guidelines. However, at MEPC 73 (October 2018), the IMO Guidelines were revised to require compliance with either ISO 15016:2015 or the ITTC 2017 Guidelines.

Class NK’s new program, known as ‘PrimeShip-GREEN/ProSTA ver.ITTC’ follows these latest IMO requirements – the International Towing Tank Conference (ITTC) 2017 Guidelines (ITTC Recommended Procedures and Guidelines 7.5-04-01-01.1, Preparation, Conduct and Analysis of Speed/Power Trials; 2017) for EEDI verification.

The former version, ClassNK’s ‘PrimeShip-GREEN/ProSTA’ has provided shipyards, and the greater maritime industry with has supported shipyards and the marine industry in general since 2015 by calculating a ship’s speed in compliance with ISO 15016:2015. The newly developed PrimeShip-GREEN/ProSTA ver.ITTC has the same user-friendly interface as its predecessor, but ship speed calculations can now be performed in accordance with ITTC 2017 Guidelines.

In addition, to continue providing technical support regarding ISO 15016:2015, the ClassNK has released ‘PrimeShip-GREEN/ProSTA ver.ISO’ which adds more functions to the former “PrimeShip-GREEN/ProSTA”. More information on either package can be found here.

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