WATCH: Bound4blue suction sails installed on first of five Maersk Tankers’ vessels
Spanish automated wind-assisted propulsion system specialist bound4blue has installed the first eSAIL units on the first of five tankers owned by Danish Maersk Tankers.

Four 24-meter ‘plug and play’ suction sails were fitted on Maersk Trieste, completing the first stage of an agreement that will see a total of 20 units installed across five advanced medium-range (MR) tankers.
“For the tanker industry, progress on emissions reduction requires concrete investments and implementation. At Maersk Tankers, we focus on deploying advanced energy-efficient technologies to reduce fuel consumption and CO2 emissions. Implementing Wind-Assisted Propulsion Systems at scale enables more energy-efficient voyages for our customers, while supporting compliance with FuelEU Maritime and the EU Emissions Trading System,” said Claus Grønborg, Chief Investment Officer at Maersk Tankers.
The contract, signed at the end of 2024, is bound4blue’s largest order to date.

The autonomous eSAILs work by drawing air across an aerodynamically optimized surface to generate lift up to
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