I don’t think it’s a good idea. By adding so much surface area so high up you create a lever for winds to create torque to cape size the vessel. The way sail

I don’t think it’s a good idea. By adding so much surface area so high up you create a lever for winds to create torque to cape size the vessel. The way sailing boats circumvent this issue is by having a big long metallic fin at the bottom of the boat(called keel). The keel counteracts the torque of the wind when the boat rotates and brings it back to a steady position. The problem is that ports have fixed depth so if you modify an existing cargo ship with a keel it will no longer fit into the commercial ports