> I question whether the cost of doing this in new novel naval architecture isn't excessive. You can have a green ship without installing Magnus effect rotor sa

> I question whether the cost of doing this in new novel naval architecture isn't excessive. You can have a green ship without installing Magnus effect rotor sails: > A) install a massive ground mount photovoltaic system > Or massive wind farm on land. > B) use the kWh from it to crack water into pressurized tanks of hydrogen Or, though it's in a different sense of "green ship": provide the power generated by the solar array / wind farm very cheaply or at-cost to offset the emissions generated by the ship. It doesn't make the ship emissions go away, but it could make something that's grid-connected become carbon neutral.