izentrop wrote:They hope for 30% savings, which gives us 865 t of "fuel saved" and 2700 t of CO2?
I do not think so. An article in English mentioned "up to 30%" (maximum of 30%), I tend to trust it more than a rough translation in French.
I interpret it as the instantaneous maximum fuel economy when the wind direction and speed are optimal relative to the ship's heading. Which is of course not always the case.
But I could be wrong.