VESSEL REVIEW | Hansa Drejoe – Multi-purpose cargo carrier for European shortsea routes

The vessel is also fitted with two foil-type wind-assist propulsion units supplied by Econowind. The foils are expected to deliver around 10 per cent additional thrust, thereby reducing fuel consumption and CO2 emissions accordingly, according to Econowind.

10% ain't no joke, that is a lot of energy!

Also see https://oceannews.com/news/energy/baltic-iron-and-baltic-timber-enter-service-with-econowind-ventofoils/

https://windpowernl.com/2026/08/12/econowinds-ventofoils-installed-on-first-of-four-leonhardt-blumberg-cargo-vessels/

https://en.wikipedia.org/wiki/Wind-assisted_propulsion

https://econowind.nl/ventifoil-to-ventofoil-simpler-design-for-more-overall-force/