Barcelona / Paris / June 25, 2025 — Wind propulsion specialist bound4blue has achieved a significant breakthrough in real-world fuel efficiency with its eSAIL® technology. A newly released, third-party assessment confirms that the Ville de Bordeaux, a Ro-Ro vessel owned by Louis Dreyfus Armateurs (LDA) and chartered by Airbus, has achieved average daily fuel savings of 1.7 metric tons over the past 12 months — with peak daily savings reaching as high as 5.4 metric tons.
The independent assessment, conducted by Bureau Veritas Solutions Marine & Offshore (BVS), validates the performance of three 22-meter eSAIL® suction sail units installed on the vessel in 2024. These sails helped achieve a total annual reduction of 568 metric tons of fuel and 2,181 metric tons of CO₂ emissions (Well-to-Wake) — without relying on weather routing or factoring in associated regulatory benefits.
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High-Tech Sails, Real-World Impact
The Ville de Bordeaux — a Ro-Ro vessel transporting aeronautical subassemblies for Airbus between Europe and the U.S. — served as a testbed for the performance of bound4blue’s next-generation eSAIL® system. The findings mark a significant validation of wind-assisted propulsion, particularly for existing vessels operating on established trade routes.
These results align closely with both bound4blue’s initial projections and LDA’s own fuel monitoring, which used real-time operational data combined with actual weather conditions to ensure accuracy. The success reinforces the viability of retrofitting wind-assisted propulsion systems, even on purpose-built vessels like the Ville de Bordeaux.
David Ferrer, CTO of bound4blue, commented “These results showcase how existing vessels – not just newbuilds – can harness wind power to deliver substantial fuel and emissions reductions. Seeing such strong, consistent performance from our eSAILs® over an entire year is incredibly exciting.”
Compact Power: Why eSAIL® Stands Out
Unlike traditional rigid sails, eSAILs® work by using active suction technology to generate high lift, producing greater propulsive force with far less surface area. This allows for compact, lightweight installations with minimal deck space — a major advantage for retrofitting a wide range of vessel types.
bound4blue’s eSAILs® can deliver six to seven times more efficiency per square meter than traditional rigid sails. Their aerodynamic adaptability ensures performance across a variety of wind angles — from beam reach to close-hauled — making them suitable for high-speed operations on global shipping routes.
Industry Endorsements and Regulatory Advantages
With installations already on vessels owned by Odfjell, Eastern Pacific Shipping, and Louis Dreyfus Company, and with new orders placed by Maersk Tankers, Marflet Marine, and Klaveness Combination Carriers, the momentum behind bound4blue is clear.
Adoption is further fueled by regulatory frameworks like the FuelEU Maritime regulation and the EU Emissions Trading System (EU ETS), where eSAILs® qualify for meaningful credits. Wind propulsion is also the only energy source currently rewarded under the FuelEU “Wind Reward Factor”, further strengthening its commercial case.
LDA: Pioneering Sustainable Logistics
For Louis Dreyfus Armateurs, the project offered an opportunity to test green technology in demanding real-world conditions.
Mathieu Muzeau, Managing Director, Transport & Logistics, LDA, said “It’s hugely rewarding to see the scale of savings enabled through this early adoption, while the performance achieved was also noteworthy – with a boost to vessel speed – as was the complete simplicity of operation. We look forward to many more tonnes of saved fuel, and reduced emissions, in the years to come.”
Third-Party Validation: A Robust Methodology
Bureau Veritas Solutions brought rigorous analysis to the assessment process. Their modeling incorporated onboard measurements, CFD-based hydro-aero load assessments, and machinery performance modeling to evaluate the impact of the eSAILs® accurately.
Camille Blayo, Ship Performance Engineer at BVS, noted “Our methodology is designed to isolate and evaluate the various factors that contribute to a ship’s fuel consumption. The Ville de Bordeaux project provided a fantastic opportunity to validate our models with extensive, high-quality data.”
A Future Fueled by Wind
With a payback period typically under five years, bound4blue’s eSAILs® offer strong returns for owners of Tankers, Bulkers, Ro-Ros, Cruises, Ferries, Gas Carriers, and General Cargo ships, whether retrofitting or outfitting newbuilds.
For a sector under increasing regulatory pressure to decarbonize, the combination of proven operational savings, regulatory rewards, and commercial scalability makes wind propulsion a smart and future-proof investment.
About Bureau Veritas Solutions Marine & Offshore
A subsidiary of Bureau Veritas Group, BVS Marine & Offshore delivers technical advisory and assurance services to support energy transition in maritime. The company specializes in energy efficiency, emissions analysis, and performance optimization for the shipping industry.
About Louis Dreyfus Armateurs
A family-owned maritime group with over 170 years of experience, Louis Dreyfus Armateurs (LDA) provides global solutions in marine transportation, logistics, renewable energy, and submarine cables. LDA operates around 30 vessels and employs over 1,800 staff worldwide.
About bound4blue
Founded in 2014, bound4blue designs and manufactures automated wind-assisted propulsion systems for maritime vessels. Headquartered in Cantabria, Spain, with offices in Barcelona and Singapore, the company has installed eSAIL® systems on six vessels and holds orders for 12 more. Its clients include Eastern Pacific Shipping, Maersk Tankers, Marubeni Corporation, and Klaveness Combination Carriers.
Source bound4blue