DNV: Clarifications on the IMO DCS/CII and EU MRV/ETS, use of bio bunker fuel
DNV releases a statutory news summarising some important clarifications on the EU MRV, IMO DCS and EU ETS including on cargo and bunker sampling as well as biofuels.
Classification society DNV on Thursday (21 November) released a statutory news summarising some important clarifications on the EU MRV, IMO DCS and EU ETS. The following are excerpts from the article:
The 2023 EU MRV and IMO DCS reporting period will soon come to an end, whilst the EU ETS regulations are coming into effect from the start of the new year. As we approach year-end, this news summarizes some important clarifications on the EU MRV, IMO DCS and EU ETS.
Below is a summary of updates and clarifications on:
IMO DCS/CII
EU MRV:
ISM company mandate for ETS
Partial emissions report
Cargo and bunker sampling
Leisure stops (relevant for cruise ships only)
Dry-docking and emissions
Biofuels
IMO DCS/CII
The Carbon Intensity Indicator (CII) is a measure of how efficiently a ship can transport goods or passengers and is given in grams of CO2 emitted per cargo-carrying capacity and nautical mile, based on reported IMO DCS data. The ship is then given an annual rating ranging from A to E, where the rating thresholds will become increasingly stringent towards 2030. For ships that achieve a D rating for three consecutive years or an E rating in a single year, a Corrective Action Plan (CAP) needs to be developed (and approved) as part of the Ship Energy Efficiency Management Plan (SEEMP) Part III, before the DCS Statement of Compliance can be issued. This functionality will be available in DNV’s SEEMP Part III tool from 1 January 2024:
Upon receiving the uploaded DCS data in early 2024, DNV will inform its customers via email for ships having a CII E rating (where urgent action is needed). Furthermore, our customers will receive a notification of the ship rating during the submission process.
Required and attained CII calculation after change of DWT/GT during 2023
As outlined in MEPC.348(78), permanent alterations to a vessel’s deadweight (DWT) and/or gross tonnage (GT) can be implemented as a measure within SEEMP Part III or as a CAP to enhance the ship’s operational carbon intensity performance. For vessels that underwent changes in DWT and/or GT after 1 January 2023, a new methodology for calculating attained and required CII will apply:
a. For changes listed in the SEEMP Part III or the CAP:
The required CII is calculated based on the original DWT/GT*. For the year of the conversion, the attained CII is calculated and verified based on the average DWT or GT value weighted on distance travelled before and after conversion. For subsequent years, the attained CII is based on the new DWT/GT.
b. For changes not listed in the SEEMP Part III or the CAP:
For the year of the conversion, the required CII and attained CII are calculated and verified based on the average DWT or GT value weighted on distance travelled before and after conversion. For subsequent years, the required CII and attained CII are based on the new DWT/GT.
EU MRV/ETS
Firstly, a brief recap of the revised EU MRV regulations:
ISM company mandate for ETS
As announced in our news from 17 November (see “References” below), the EC has adopted an implementing regulation detailing which company is responsible for monitoring and reporting GHG emissions and surrendering emission allowances. The default responsible entity is the registered owner. The responsibility can be shifted to the ship manager – i.e. the ISM company – only if an agreement between the registered owner and the ISM company explicitly states this shift in responsibility.
In the event that the shipowner delegates the EU ETS obligation to a shipping company, the shipping company shall provide its administering authority with a document clearly indicating that it has been duly mandated by the shipowner to comply with the ETS obligations. DNV has prepared a template for such an agreement, available free of charge for our customers in Fleet Status on Veracity:
In addition to the above, in the updated MRV MP online form our customers will find the same document template and can populate it with relevant data. The functionality is available under the “Important information for ISM companies” button found on the “Administrative data” tab.
The mandate document shall be duly filled out and signed by both the shipowner and the shipping company. It should be provided upon MRV MP submission in THETIS MRV portal to your MRV verifier and made available to the administering authority.
Partial emissions report
The issuance of the partial emissions report was also mentioned on our news from 17 November, but a few clarifications need to be added: from 5 June 2023, the revised MRV regulation requires that upon change of company, a partial MRV emissions report (ER) is to be submitted for verification. The verified partial MRV ER should be submitted to the administering authority, flag state authorities of the Member State, the European Commission and to the new company as close as practical to the day of change of company and no later than three months thereafter. The verified data covering the previous company’s responsibility period should form a part of the MRV ER that will be submitted by the company responsible at the end of the reporting year.
However, the previous company’s emissions for a vessel which has been taken over by a company will not be a part of the aggregated emissions data at the company level for the new company. Therefore, the company taking over the ship will not be liable to surrender allowances for the period when the vessel was under the previous management or ownership. Nevertheless, the current owner/manager still needs to request the verified aggregated MRV data for the previous company’s period to fulfil MRV obligations at the end of the year. This data, combined with the log abstract data, will form a full-year MRV ER.
Taking into consideration that changes have only been recently implemented in THETIS-MRV and an administering authority must be first assigned to the companies to fulfil the obligations of the MRV Regulation Article 11.2, DNV will support verification of partial MRV ER from January 2024. Submission and verification of 2023 partial MRV ERs will also be enabled.
Cargo and bunker sampling
For some time, with the public attention on verified emissions data rising and the EU ETS soon effective, regulators and accreditation bodies have been increasing the stringency of formal verification requirements. This means that DNV is now required to review documents on reported bunkering and cargo data, including evidence for reported bunkering and reported MRV-relevant cargo figures per emissions report. This ensures the MRV ERs will have the required quality considering the increasing relevance of verified emissions data. Additional information is available in Fleet Status on Veracity:
Biofuels
The different regulations have different approaches on how to deal with biofuels, summarized in the following:
When aggregated and put side-by-side, total carbon emission from the use of biofuel will vary substantially between the three schemes. EU MRV emissions data is the basis for determination of total emission of GHG to be reported under the EU ETS Directive. However, by applying a CO2 factor of zero for biofuel fraction of fuel used, the ETS-relevant emission is reduced. For CII, a completely different set of rules is applied, focusing on the life cycle’s emissions of fuel. Different criteria for the application of the methodology as described above should be noted and consulted with the fuel supplier before the fuel purchase, with the aim to claim benefits from the use of biofuel in GHG reporting.
Further information on how to report the use of biofuels is available on the OVD resources page. If guidance is needed on how to update the SEEMP Part II and the MRV Monitoring Plan in relation to the use of biofuel, we invite you to contact our DATE experts.
BHP and the Global Centre for Maritime Decarbonisation (GCMD) on Wednesday (3 June) said they have blended biofuels from two distinct feedstocks—used cooking oil and waste animal fats —and introduced the lower-emissions marine fuel into a BHP-chartered bulk carrier as part of a pilot project.
The bio-blend in the BHP and GCMD pilot is being used on a BHP-chartered bulk carrier Berge Lyngor, owned and operated by Berge Bulk, transporting BHP iron ore from Western Australia to China. When run on bio-blend, the vessel has the potential to reduce well-to-wake greenhouse gas emissions by approximately 79 per cent per voyage compared to sailing on very low sulphur fuel oil (VLSFO).
The vessel bunkered in Singapore in early May with a B100 bio-blend comprising 50 percent tallow-derived biodiesel, sourced and supplied by HAMR Energy, and 50 per cent used cooking oil (UCOME) supplied by Mitsui & Co Energy Trading Singapore (METS).
Mitsui also blended the fuel and Dan-Bunkering coordinated and executed the bunkering operation, which was performed by Global Energy’s barge MT Maple.
The BHP and GCMD pilot will assess how biofuels from multiple feedstocks can be blended, handled, and introduced under real-world operating conditions using existing used cooking oil bunkering infrastructure.
At the same time, insights from this pilot will help identify solutions to challenges related to fuel quality, handling, traceability, and onboard vessel performance.
Biofuels for global shipping today rely heavily on used cooking oil – a feedstock whose availability is approaching its projected limits. Biofuel from waste animal fats presents a promising option to expand the supply of lower-emissions marine fuels.
The outcomes of the pilot are expected to shed light on the practical steps to integrate biofuel blends from different feedstocks into existing supply chains. The diversity of biofuels will provide shipowners and operators with greater flexibility to optimise fuel procurement based on cost, availability, and lifecycle emissions performance.
Biofuels derived from different feedstocks can exhibit varying properties that may impact operations, including potential corrosion from oxidation, fuel system clogging caused by wax formation, which this pilot aims to assess.
The pilot will trace and verify the biofuel blend’s integrity aimed at bolstering confidence in emissions reductions reporting. The pilot will also provide insights into how robust tracing can support future marine fuel supply chains where biofuels from multiple feedstocks with varying lifecycle greenhouse gas emissions footprints are blended together.
This project is co-funded by the Maritime and Port Authority of Singapore under the Maritime Innovation and Technology Fund (MINT).
Photo credit: Global Centre for Maritime Decarbonisation Published: 3 June, 2026
NYK starts one-year B100 bio bunker fuel trial on car carrier
In this trial, NYK will operate a car carrier continuously on B100 for one year to evaluate the impact on engines, fuel supply systems, and operational practices.
Japanese shipping firm NYK on Tuesday (2 June) said it has commenced a one-year long-term trial involving the continuous use of 100% biofuel (B100) on an NYK-operated car carrier.
In this trial, NYK will operate a car carrier continuously on B100 for one year to evaluate the impact on engines, fuel supply systems, and operational practices. High-purity biofuels such as B100 are known to be susceptible to degradation from oxygen, light, and heat, raising concerns about the stability of such fuels during long-term use.
In this trial, the biofuel primarily comprises FAME (Fatty Acid Methyl Ester) derived from used cooking oil and similar feedstocks.
The initiative is designed to evaluate the fuel’s effects on the vessel’s equipment and verify operational safety under real-world conditions.
Through this effort, NYK seeks to accumulate technical expertise that will support the broader use of high-purity biofuels and further accelerate efforts to reduce greenhouse gas (GHG) emissions.
NYK has been advancing the use of biofuels through various initiatives. In 2024, the company conducted a trial using biofuel blend B24 and subsequently expanded practical usage to B30. However, the company said there remains limited global experience with the long-term continuous use of B100.
“By collecting long-term operational data through this trial, NYK aims to accumulate valuable technical insights to support both the safe operation of vessels and the wider adoption of high-purity biofuels,” it said.
Biofuel producer Sunoil recently said it successfully converted the barge Birjo II to run on 100% biodiesel (B100), in collaboration with BFT Tanker Logistics.
The company said the conversion of the barge to run on B100 marks an important step toward reducing emissions within inland shipping and demonstrates how existing barges can already contribute to a more sustainable transport sector.
The Birjo II, owned by DK Shipping, is a large barge used for transporting biofuels on Dutch inland waterways. It is primarily used for transporting biodiesel from Sunoil’s production facility in Kampen to its storage locations, while also carrying out direct deliveries to customers.
By transitioning from fossil fuel to B100, the barge can reduce CO₂ emissions by up to 90% while continuing normal operations without replacing the engine itself.
“This makes Birjo II one of the first barges in the world capable of running fully on 100% biodiesel,” the company added.
The barge will be able to be fueled directly from Sunoil’s Kampen location, creating a fully integrated renewable fuel chain from production to transport and end use.
“What makes this project especially valuable for Sunoil is that Birjo II now operates on our own biodiesel while transporting renewable fuels between our locations and customers,” said Jeroen Hovius, Chief Commercial Officer at Sunoil.
“Together with BFT, we are continuing a strong long-term collaboration focused on practical solutions that help make inland shipping more sustainable. At the same time, this project creates a platform for the conversion and rollout of multiple barges operating on B100 across Europe.”
Sunoil said the successful conversion of Birjo II demonstrates that existing inland shipping assets can already be adapted today to significantly reduce emissions.
“It highlights how practical renewable fuel solutions can support a more sustainable future for inland shipping without requiring full vessel replacement,” it added.