The original technology was demonstrated in an Atlantic crossing that took place in 1926, but Norsepower says it has created various new improvements for which several patents have been granted.
Last year (reports New Atlas) we detailed how Norsepower had rediscovered an engineering innovation, which sees large cylinders installed atop big ships to harness wind for propulsion.
Now a passenger ship has been treated to the Rotor Sail Solution and has set sail on wind-assisted trips between Finland and Sweden.
The M/S Viking Grace – which has 880 cabins and can accommodate 2,800 passengers and around 500 cars – went into service in 2013, when it was reported to be the first ship of its size to be fueled by Liquefied Natural Gas (LNG).