Bureau Veritas has completed the independent verification of methane emissions for Brittany Ferries’ LNG-fueled fleet, including the Salamanca and Santoña. By documenting actual methane slip values instead of using regulatory defaults, the operator enhances compliance accuracy under EU MRV and FuelEU Maritime frameworks. This technical milestone, supported by the French Flag Administration, provides a transparent, data-driven basis for reducing greenhouse gas intensity and EU ETS exposure for maritime operations across Europe and the UK.
France | March 19, 2026 – In a landmark move for maritime decarbonization transparency, Bureau Veritas Marine & Offshore (BV) has completed the independent verification of methane (CH₄) emissions across four of Brittany Ferries LNG-fueled vessels.
The verification, conducted in close coordination with French maritime authorities, marks a pivotal shift from regulatory guesswork to empirical precision. By documenting actual “methane slip” under real-world operating conditions, the French ferry operator can now bypass conservative default emission factors in favor of verified, measured data for EU MRV and FuelEU Maritime compliance.
Shifting the Regulatory Needle
Current European and International Maritime Organization (IMO) frameworks often rely on default methane slip values, sometimes as high as 3.1%. However, BV’s rigorous monitoring campaign suggests these benchmarks may significantly overstate the environmental impact of modern LNG engines.
The verification covered four key vessels in the Brittany Ferries fleet:
- Salamanca
- Santoña
- Saint-Malo
- Guillaume de Normandie
On the Salamanca, the study spanned a twelve-month monitoring period across the Rosslare–Bilbao and Rosslare–Cherbourg routes. The resulting data, published in the Journal of Marine Science and Engineering, confirms that the actual annual methane slip rate is substantially lower than standard regulatory assumptions.
The Path to Verified Performance
To move beyond default values, Brittany Ferries and BV navigated a complex technical and administrative process mandated by IMO Resolution MEPC.402(83). This required the development of a “Methane Emissions Documentation Package” for each engine, comprising:
- Methane Emissions File: Detailed technical specifications for each relevant engine.
- Methane Record Book: A continuous log of emissions-related data.
- Engine Load Monitoring (ELM) Procedure: The methodology used to correlate engine performance with emissions for FuelEU Maritime reporting.
Following BV’s review, the French Flag Administration approved the files and issued a Form of Statement confirming the engine-weighted verified values. This allows Brittany Ferries to report its actual environmental footprint, directly influencing its liability under the EU Emissions Trading System (EU ETS).
Leadership Perspectives
David Barrow, SVP for Western Europe and Americas, Bureau Veritas Marine & Offshore said “This collaboration demonstrates how independent measurement and verification can enhance the accuracy of regulatory reporting while reinforcing transparency and accountability in greenhouse gas emissions. By supporting the recognition of measured methane performance, we are helping ensure that the real environmental gains achieved by LNG-fueled vessels are properly reflected within evolving regulatory frameworks.”
Bertrand Crispils, Head of Energy Transition, Brittany Ferries said “The achievement of this work is another key step on our energy transition journey… It clearly shows how technical expertise can allow us to unlock improvements in environmental performance and how flexibility in regulations provides shipowners with the means to find innovative, creative and pragmatic solutions. This project was the fruit of great teamwork between scientist, shipowner, certifier, and manufacturer.”
Industry Implications
As the maritime sector faces increasing pressure to quantify every gram of CO2-equivalent, the “methane slip” issue has become a multi-million euro variable. With the inclusion of shipping in the EU ETS, the ability to replace “penalizing” default constants with verified lower values provides a clear competitive advantage for operators invested in high-efficiency LNG technology.
This verification sets a precedent for the industry, proving that through rigorous monitoring and multi-party collaboration, involving partners like ESTACA and Wärtsilä, shipowners can turn technical performance into verified regulatory capital.
About Brittany Ferries
Brittany Ferries is a French maritime transport company and the largest employer of French sailors. The company operates a fleet of 12 vessels and is committed to reducing its environmental footprint through innovative solutions, such as the use of LNG and hybrid technologies. Brittany Ferries plays a key role in driving economic development and tourism across France, the UK, Ireland, and Spain while striving for a more sustainable and eco-friendly future for the shipping industry.
About Bureau Veritas
Bureau Veritas (BV), founded in 1828, is a world leader in inspection, certification, and laboratory testing services with a powerful purpose: to shape a world of trust by ensuring responsible progress. With a vision to be the preferred partner for customers’ excellence and sustainability, the company innovates to help them navigate change. With over 84,000 employees in 140 countries, BV brings unparalleled expertise in sustainability, safety, and technological advancement.
Source: Bureau Veritas