M/S Viking Grace is one of the most environmentally friendly cruise ferries in the global maritime industry. With the addition of Norsepower’s product, the vessel was able to further reduce its emissions, fuel burn, and fuel costs; reducing carbon emissions by circa 900 tonnes annually. That is equivalent to cutting 300 tons of LNG fuel per year, making it the first-ever global LNG/wind electric propulsion hybrid ship. During the first year of operation, a measurement campaign was conducted to confirm the long term fuel saving potential. The work of three independent top research parties (ABB, Chalmers University, and NAPA) complemented Norsepower’s own force measurement analysis. All four studies confirmed that the Norsepower Rotor Sail™ reduced power consumption between 207-315 kW equalling 231-315 tons of fuel every year, well in line with the original target of the project. This verification and data has been an enormous help in Norsepower’s later sales operations.