bound4blue has secured a Design Assessment from Bureau Veritas for its Model 3-24 eSAIL wind propulsion system. The assessment confirms that the suction sail design has been independently reviewed against Bureau Veritas’ technical requirements. The recognition comes as bound4blue expands the deployment of its wind propulsion technology across commercial shipping. More than 50 eSAIL units ordered bound4blue said more than 50 eSAIL units have now been ordered . Its technology has already been installed on 13 vessels , while another six vessels are in the company’s orderbook. The Model 3 range includes sails from 24 to 36 metres high. The Model 3-24 completed its first commercial installation earlier this year. The system was installed aboard Klaveness Combination Carriers’ newbuild MV Baltazar . The larger Model 3 range is designed to extend the technology to bigger vessels. Bureau Veritas reviews Model 3-24 design The Design Assessment was presented during SMM 2026 in Hamburg. Bureau Veritas reviewed the Model 3-24 against its technical requirements. “Wind propulsion is becoming an increasingly important element of the maritime industry’s decarbonisation journey,” said David Barrow, SVP for Western Europe and Americas at Bureau Veritas Marine & Offshore. He added that independent technical assessments can provide greater confidence as wind propulsion systems mature. Suction sails target lower fuel consumption The eSAIL system uses boundary layer suction to generate propulsive force from wind. According to bound4blue, the technology can generate up to seven times more propulsive force than a rigid sail of the same size . The system works alongside a vessel’s conventional propulsion system. It can be installed on both existing vessels and newbuilds. bound4blue said its eSAIL technology can deliver double-digit fuel savings , depending on the vessel and operating conditions. The company also reports typical payback periods of less than