Swedish Shipping Embraces Wind-Assisted Propulsion to Cut Emissions and Costs

As global regulations tighten on shipping emissions, the industry is turning to wind-assisted propulsion to enhance sustainability and reduce operational costs. Container ships, such as those with 8,000-unit capacity, consume about 150 tons of bunker oil daily, contributing to emissions. Swedish company Wallenius Wilhelmsen is at the forefront, having installed the world’s first wing sail on the car carrier Tirranna in June 2025 and planning further tests on the Way Forward vessel by 2027. This technology could reduce fuel consumption by up to 10% on favorable routes.

Similarly, Danish shipping giant Maersk is actively investing in wind-assisted technologies, planning to fit rotor sails on one of its 707 vessels. Anemoi’s technology claims emissions reductions of 5 to 30% with three to five rotors per ship. The introduction of the EU's FuelEU Maritime regulation incentivizes such innovations by offering bonuses for wind-assisted propulsion, as part of broader efforts to meet ambitious emissions targets effective from 2026. Maersk also faces high energy costs of around $500 million monthly and aims for net-zero emissions by 2040.

Historically, rotor sails have seen mixed success, exemplified by applications on Viking Grace and Scandlines ferries, but renewed interest from leading companies signals a promising shift. These developments align shipping with increasingly stringent environmental regulations and the demand for greener, economically viable alternatives.