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Bunker Fuel

DNV: IMO to review circular on bunker tankers carrying biofuel blends up to B30

IMO PPR12 finalised an interim circular allowing conventional bunker ships certified as oil tankers under MARPOL Annex I to carry biofuel blends containing up to 30% biofuel; circular is subject to approval by MEPC 83 in April.

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Classification society DNV on Monday (3 February) shared a statutory news article that provides a summary of the 12th session of the IMO’s Sub-Committee on Pollution Prevention and Response (PPR 12).

The following is an excerpt from the news update relating to bunker fuels:

The 12th session of the IMO’s Sub-Committee on Pollution Prevention and Response (PPR 12) was held in London from 27 to 31 January 2025. PPR 12 finalized guidance on in-water cleaning of ships’ biofouling and guidelines on certification of Selective Catalytic Reduction systems. A wide range of other topics was on the agenda, including cargo tank cleaning procedures, carriage of biofuel blends, black carbon, discharge water from Exhaust Gas Cleaning Systems, sewage treatment and marine plastic litter.

Meeting highlights

  • Finalized a circular on guidance on in-water cleaning of ships’ biofouling
  • Revised guidelines on certification of Selective Catalytic Reduction (SCR) systems
  • Agreed on an interim circular allowing bunker ships certified as oil tankers to carry biofuel blends containing up to 30% biofuel
  • Discussed amendments to MARPOL Annex II on cargo tank stripping, tank washing operations, and prewash procedures
  • Continued the revision of MARPOL Annex IV on sewage treatment
  • Reviewed the Action Plan to address marine plastic litter from ships

Safety and pollution hazards of chemicals and preparation of amendments to the IBC Code

Carriage of biofuel blends on bunker ships

Currently, oil tankers are permitted to carry biofuel blends containing up to 25% biofuel, while blends exceeding this limit are restricted to transport on chemical tankers. PPR finalised an interim circular allowing conventional bunker ships certified as oil tankers under MARPOL Annex I to carry biofuel blends containing up to 30% biofuel. The circular is subject to approval by MEPC 83 in April. 

Prewash requirements for FAME  

Due to the physical properties of Fatty Acid Methyl Ester (FAME) and several pollution incidents in the North Sea resulting from tank cleaning after unloading of FAME, PPR 12 considered a proposal to add operational requirement 16.2.7 to the IBC Code entry for FAME. This would mandate a prewash after unloading FAME. The geographical area of concern will be as defined by Regulation 13.9 in MARPOL Annex II, extending from Gibraltar in the south, along the Norwegian coast, including the Baltic Sea, as well as the UK and Ireland. The ESPH Technical Group, reporting back to PPR 13 in 2026, was tasked with further consideration of this proposal. 

Air pollution

Black carbon (BC)

PPR 12 reviewed the “polar fuels” concept based on five key characteristics for discussion: density, viscosity, carbon residue content, cetane index or number, and pour point. However, there was no consensus on recommending distillate fuels as “polar fuels”. ISO provided insights on defining a polar fuel standard and the impact of a proposed pour point requirement, concluding that a maximum 0°C pour point would have minimal global impact.

PPR 12 agreed to further work on the “polar fuels” concept at PPR 13, supported by scientific studies and BC measurement campaigns.

Discharge water from Exhaust Gas Cleaning Systems (EGCS)

PPR 12 discussed developing possible regulatory provisions on restrictions of discharge water from EGCS but noted that a global ban was outside the scope its work.

PPR 12 reviewed the terms of reference for the GESAMP Task Team on EGCS, with the aim of developing a methodology for emission factors to ensure a uniform evaluation of regional restriction areas. The draft terms were forwarded to MEPC 83 for approval, with an extension of the target completion year to 2026.

Review of the IBTS guidelines and amendments to the IOPP certificate and Oil Record Book

PPR 12 considered two proposals to amend MARPOL Annex I, aiming to introduce requirements that would recognize forced evaporation of oily bilge water as an acceptable disposal method. However, due to mixed support for the proposals and time constraints, this agenda item was deferred to PPR 13.

Note: The full statutory news article on PPR 12 by DNV can be found here.

 

Photo credit: CHUTTERSNAP on Unsplash
Published: 6 February, 2025

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Mass Flowmeter

Hong Kong backs MFM adoption with voluntary scheme to boost bunkering competitiveness

Hong Kong’s Marine Department launched the Quality Bunker Operator Scheme to encourage bunker operators to install and use mass flow meter systems on their bunker vessels.

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Hong Kong’s Marine Department (MD) on Wednesday (3 June) launched the Quality Bunker Operator Scheme to encourage bunker operators to install and use mass flow meter systems (MFM systems) on their bunker vessels.

MD said the scheme aims to enhance Hong Kong’s bunkering service quality and the competitiveness of Hong Kong ports, thereby further consolidating Hong Kong’s position as an international maritime centre and a major bunkering port.

Under the Scheme, bunker operators of traditional maritime fuel and biodiesel that install and use MFM systems on their bunker vessels, with the MFM systems inspected and certified by an accredited body in accordance with the International Organization for Standardization’s ISO 22192 Standard or equivalent requirements, can apply to the MD for inclusion in the scheme’s “List of Quality Bunker Vessels”, provided they meet the relevant technical and operational requirements. 

Details of the bunker vessels successfully included in the List will be published on a dedicated page on the MD’s website for reference by shipping companies and relevant stakeholders.

Participation in the Scheme is voluntary. In addition to receiving recognition from the MD, participating bunker operators will benefit from enhanced corporate image and competitiveness through the adoption of MFM systems, thereby boosting customers’ confidence and helping to create new business opportunities.

 A spokesman for the MD, said: “As an international maritime centre supported by our country, Hong Kong has a strategic location adjacent to major international fairways. Coupled with years of development in marine fuel bunkering, Hong Kong possesses rich experience and talent in the field. For many years, Hong Kong has consistently ranked as the seventh-largest bunkering port globally, the second-largest in our country, and the largest in the Greater Bay Area, providing reliable and competitive fuel bunkering services to ocean-going vessels from around the world. 

“As the international shipping industry has an increasing demand for accuracy and transparency in bunkering services, service quality and measurement precision in bunkering operations have become important indicators of a bunkering port’s competitiveness. The Scheme will enhance bunkering accuracy and transparency, further enhancing the quality of Hong Kong’s bunkering services.

The spokesman added that comprehensive port services are one of Hong Kong’s key advantages as an international maritime centre.

“We will also mandate the use of MFM systems on all methanol bunker vessels this year to ensure that Hong Kong continues to provide high-quality bunkering services in the era of green maritime fuels.” 

Note: The application form for the Scheme can be found on the MD’s website. Interested bunker operators can download the application form from the website or contact the MD’s Green Maritime Fuel Team via email ([email protected]) for details.

 

Photo credit: Manifold Times
Published: 4 June, 2026

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Alternative Fuels

MPA and MSC ink MoU to support adoption of alternative bunker fuels

MPA and MSC will explore new routes and services to strengthen connectivity, support the adoption of alternative marine fuels such as bio-LNG, and advance technologies to improve vessel energy efficiency.

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MPA and MSC ink MoU to support adoption of alternative bunker fuels

The Maritime and Port Authority of Singapore (MPA) on Wednesday (3 June) said it signed a Memorandum of Understanding (MoU) with MSC Mediterranean Shipping Company to strengthen collaboration in maritime decarbonisation, digitalisation, innovation, and manpower development. 

The MoU was signed on 25 May 2026 by Mr Ang Wee Keong, Chief Executive of MPA, and Mr Soren Toft, Chief Executive Officer of MSC.

The MoU underscores the shared commitment of MPA and MSC to foster a sustainable, digital, and future-ready maritime sector, while enhancing MSC’s operational and business activities in Singapore. This year also marks the 30th anniversary of MSC establishing its Asia Regional Office and local office in Singapore.

Under the MoU, MPA and MSC will explore new routes and services to strengthen connectivity, support the adoption of alternative marine fuels such as bio-LNG, and advance technologies to improve vessel energy efficiency and operational performance.

MPA and MSC will also collaborate on maritime digitalisation initiatives to improve operational efficiency, including streamlining vessel arrivals and port operations. 

On manpower development, MSC will support internship and scholarship opportunities through Singapore Maritime Foundation’s Maritime Outreach Network (MaritimeONE) platform, an industry-led tripartite partnership comprising industry, government and institutes of higher learning that aims to raise awareness of the maritime industry and attract quality talent into the maritime sector.

Mr Ang Wee Keong, Chief Executive of MPA, said: “This partnership reflects the strong collaboration between MPA and MSC in driving sustainability and digitalisation in the maritime sector. By working together on decarbonisation, operational efficiency and talent development, we aim to strengthen Maritime Singapore’s position as a trusted and future-ready global maritime hub.”

Mr Soren Toft, Chief Executive Officer of MSC, said: “Singapore is a strategically important hub for MSC and a key gateway to the broader Asia region. As we mark 30 years in Singapore, this MOU reinforces our long-term commitment to strengthening our presence here. MSC and Singapore are closely aligned on the priorities shaping the future of global shipping, and we look forward to deepening this partnership to drive the continued growth and resilience of the maritime industry.”

 

Photo credit: Maritime and Port Authority of Singapore
Published: 4 June, 2026

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Methanol

Seaspan and Hapag-Lloyd complete first of five methanol vessel retrofit

Following “Seaspan Yangtze”, the remaining vessels planned for retrofit under the methanol retrofit programme are “Seaspan Amazon”, “Seaspan Ganges”, “Seaspan Thames”, and “Seaspan Zambezi”.

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Seaspan and Hapag-Lloyd complete first of five methanol vessel retrofit

Seaspan Corporation (Seaspan) and Hapag-Lloyd on Wednesday (3 June) announced the successful completion of the first of the five vessel conversions under their methanol retrofit programme with the delivery of Seaspan Yangtze.

From the early SAVER (Seaspan Action for Vessel Energy Reduction) programme to today’s CleanBlue initiative, Seaspan has committed over USD 230 USD million across 86 vessels, executing more than 550 efficiency and retrofit projects.

Following Seaspan Yangtze, the remaining vessels planned for retrofit under the programme are Seaspan Amazon, Seaspan Ganges, Seaspan Thames, and Seaspan Zambezi. Each retrofit is expected to reduce well-to-wake CO₂e emissions by approximately 30,000 to 50,000 metric tonnes per vessel annually when operating on low-carbon methanol, while also extending vessel lifespan and enhancing fuel flexibility.

“Decarbonisation is not just about building the fleet of tomorrow, it is also about unlocking the full potential of the fleet we have today. Retrofitting and upgrades on existing fleets play a practical, immediate, and economical role in accelerating shipping’s decarbonization journey,” said Bing Chen, Chairman, President and CEO of Seaspan. 

“Project SAVER CleanBlue highlights Seaspan’s strong customer partnerships, deep technical expertise, and unique platform integrated with JV partners, such as WattSpan Maritime Technology, in executing complex and large-scale retrofit projects.”

“The successful conversion of the Seaspan Yangtze together with the planned retrofit of its four sister vessels is another important step on our ambitious path towards net-zero fleet operations by 2045,” said Silke Lehmköster, Managing Director, Fleet, Hapag-Lloyd. 

“Together with Seaspan, we are demonstrating that retrofitting existing vessels for low-carbon methanol can be a practical way to reduce emissions in shipping.”

 

Photo credit: Seaspan
Published: 4 June, 2026

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