Tag: ClassNK

ClassNK has issued Technical Information to notify about special requirements for relevant equipment of fire-fighter's outfit regarding Antigua and Barbuda flagged vessels.

ClassNK has announced the launch of a new feasibility study for a new marine renewable energy testing facility to be built in Singapore. The announcement was made at the 2014 Asian Clean Energy Summit held in Singapore on 28-29 October 2014. The study will pave the way for the establishment of the world’s first marine renewable energy testing facility to be located in the tropics. Demand for renewable energy has soared in recent years, fuelling high expectations for the use of marine renewable energy. Many governments around the world are already implementing policies to attract new marine renewable energy installations, and the large scale implementation of new renewable energy technologies is under consideration. With the practical implementation and installation of new marine energy installation technologies on the horizon there is a growing need for testing facilities and clear procedures for verifying the safety and efficiency of new maritime renewable energy technologies. Singapore is one of the countries leading these efforts.The new study will assess the feasibility of establishing a testing facility for 1/5-1/10 scale tidal wave generator systems in the waters off the coast of Singapore, including surveys of tidal forces, as well as environmental and operational viability assessments. This ...

ClassNK has completed the EEDI appraisal of Harvest Frost, the world’s first post-panamax bulk carrier fitted with the Mitsubishi Air Lubrication System (MALS). The Harvest Frost was constructed by Oshima Shipbuilding Co., Ltd. for ADM Harvest Shipping in accordance to ClassNK rules and guidance. Developed by Mitsubishi Heavy Industries with support of ClassNK’s Joint R&D for Industry Program, MALS uses specialized blowers to create a layer of bubbles that flow along the bottom of a hull to improve fuel efficiency by reducing frictional resistance. While EEDI is calculated and evaluated primarily based on hull form, ship speed, and engine efficiency, the IMO has also established guidelines for including the effect of innovative new technologies, such as MALS, in the verification and calculation of a vessel’s EEDI. The appraisal and certification of the EEDI of the MALS-equipped Harvest Frost is understood to be the first time that the effect such an innovative technology has been evaluated part of a vessel’s EEDI. ClassNK has supported the development of EEDI regulations throughout the deliberation and enforcement stages at the IMO. ClassNK carried out the very first EEDI evaluations as part of the deliberation process at the IMO, and has carried out EEDI certifications for ...

Classification society ClassNK announced that it has completed work on the 31,445 GT Product Tanker MUTRIBA

ClassNK announced that it has released Guidelines for Exhaust Gas Cleaning Systems. These guidelines cover class safety requirements as well as safety requirements stipulated in the IMO guidelines. The MARPOL Convention Annex VI has placed phased limits on the maximum allowable amount of sulphur in fuel oils used by vessels globally, as well as stricter requirements in geographically defined emission control areas. Under the regulation, more stringent limits will be enforced over time. In the face of these more stringent limits, the industry has begun to look towards alternative solutions to the expensive low sulphur content fuel oils currently required by the regulations. Exhaust gas cleaning systems, which reduce the amount of sulphur in vessel emissions, are one such technology. The use of such systems requires approval from relevant authorities in accordance with guidelines issued by the IMO, and today a number of such systems are being developed and installed in line with the IMO guidelines. In order to support industry efforts to install and operate IMO guideline-compliant exhaust gas cleaning systems, ClassNK joined with Japan’s National Maritime Research Institute (NMRI) to develop the new Guidelines for Exhaust Gas Cleaning Systems, which offers comprehensive explanations of the contents of the IMO ...

Special requirements for cylinders and spare cylinders onboard Bahamas flagged vessels

ClassNK has received authorization from Transport Canada to carry out statutory surveys on Canadian-flagged vessels on behalf of the Government of Canada

ClassNK has announced the establishment of a new Renewable Energy Department. This new department which began operations on 1 October 2014 will oversee a diverse range of activities related to renewable energy, including audits and certification of new technologies.

Investigative Panel on Large Container Ship Safety findings (Image Credit: FleetMon.com)In response to the casualty of "MOL COMFORT" which occurred on 17 June 2013, ClassNK established the Investigative Panel on Large Container Ship Safety, comprised of leading experts from shipbuilders, shipowners and academic institutions.ClassNK issued the findings and outcomes of the panel consolidated into a report.Investigation of Structural SafetyAs stated in JG Report, it is inferred that in the fracture accident, the bottom shell plates were buckled and collapsed in the midship part of the Ship first and the hull girder was fractured subsequently in a short time. As far as investigated, there have been no cases in the past where collapse of bottom shell plates was the origin of hull girder fracture.It is essential to find out the mechanism of the hull girder fracture and to establish adequate assessment procedures for the hull structural strength in order to prevent similar fracture accidents.In this investigation, 3-hold model elasto-plastic analyses were carried out on a number of large container ships including the Ship and the margin against the expected loads was investigated. The relationship between the buckling collapse strength of bottom shell plates and the hull girder ultimate strength was also ...

PrimeShip software latest version is now able to calculate the added resistance in irregular waves ClassNK has released the latest version of its PrimeShip-GREEN/MinPower software. The software was originally developed by ClassNK and released in April 2014 to help shipyards comply with amendments to MARPOL Annex VI, specifically EEDI requirements, by calculating minimum propulsion power requirements in compliance with the IMO 2013 INTERIM GUIDELINES FOR DETERMINING MINIMUM PROPULSION POWER TO MAINTAIN THE MANOEUVRABILITY OF SHIPS IN ADVERSE CONDITIONS. With this updated software, users will now be able to calculate the added resistance in irregular waves, allowing for minimum propulsion power requirements to be determined to an even greater accuracy.To evaluate the minimum propulsion power requirement, added resistance in irregular waves must be calculated with ship's lines. ClassNK incorporated a new calculation module into the software to calculate the added resistance in irregular waves accurately developed by National Maritime Research Institute of Japan in addition to simplified formula for calculating added resistance in waves using only basic information.The PrimeShip-GREEN/MinPower software is provided to shipyards free of charge.Further information may be found on ClassNK websiteSource and Image Credit: ClassNK