ClassNK issues AiP for jointly developed ammonia fuelled bulk carrier

(Posted on 27/01/23)

ClassNK has issued an Approval in Principle (AiP) for a large ammonia fuelled 210,000 DWT bulk carrier jointly developed by Mitsui O.S.K. Lines, Ltd. (MOL) and MITSUI & CO., LTD (MITSUI).

Ammonia is expected to be used as a ship fuel for decarbonization since it does not emit CO2 when combusted. Meanwhile, adequate safety measures are imperative as it has been pointed out that ammonia is toxic to humans and corrosive to materials. ClassNK has been involved in projects aiming for zero-emission ships using ammonia fuel in terms of safety assessment, and has issued its "Guidelines for Ships Using Alternative Fuels” as a necessary standard to minimize the risks related to ammonia-fuelled ships for the ships, crews, and environment by stipulating requirements for installation, controls, and safety devices.

MOL and MITSUI have jointly determined the size and specifications for the vessel, and its design has been entrusted to Mitsubishi Shipbuilding Co., Ltd. ClassNK carried out the review of this jointly developed design in line with Part C of its guidelines and issued the AiP on verifying conformity to the prescribed requirements. In addition, risk assessment (HAZID) will be conducted to confirm that no unacceptable risks exist at the basic design stage and to identify items to be considered in the detailed design.

ClassNK will continue to support those companies as the certification body and will strive to provide appropriate standards for ammonia-fuelled ships through the expertise gained from the collaboration.

Approval in Principle (AiP): At the initial stage of designing or before the specific target ship to be implemented is decided, the design is examined based on the existing regulations such as international conventions and ship classification rules, and an Approval in Principle (AiP) is issued as proof of conformity with requirements. It also prevents rework of regulatory aspects in the post-process, shortens the examination time at the time of class registration, and can be used as a technical basis for external appeal of the design status.

Latest News

Posidonia 2026 takes centre stage amid global freedom of navigation challenges

From insurance and risk management to energy transition, digitalisation and maritime security, the Posidonia... Read more

First maritime compliance & prevention-focused organisation, PaS, joins DBCE

Prevention at Sea (PaS), a leading maritime compliance, auditing, and digital solutions provider, has... Read more

NorthStandard reports strong results and strategic momentum

NorthStandard has reported strong financial results, continued strategic progress and enhanced support... Read more

Latest guidance for vessel transit through Strait of Hormuz

Hundreds of vessels remain unable to transit the Strait of Hormuz and, in the event of a return to more... Read more

The Bahamas regains QUALSHIP 21 eligibility

The Bahamas has regained eligibility for the United States Coast Guard’s QUALSHIP 21 programme... Read more

First dedicated STS standard for dry bulk released by INTERCARGO

Ship to ship (STS) transfers are an established part of dry bulk operations, and they are growing. As... Read more

Columbia reinforces commitment to maritime talent

Columbia Group has strengthened its commitment to developing the next generation of maritime professionals... Read more

Jamaica marks 50 years at IMO with call for island states to shape future

The Maritime Authority of Jamaica has marked Jamaica’s 50th anniversary as a member of the International... Read more

Costamare Bulkers logs first profit after Cargill deal removes most legacy trading

Costamare Bulkers Holdings Limited has reported unaudited financial results for the first quarter ended... Read more

NORDEN strengthens fleet with the addition of four Handysize vessels

NORDEN have announced that they have expanded their fleet with the purchase of four dry cargo Handysize... Read more