Several years ago I was asked to design a sail assisted 235′ container ship. On the webpage it says composite, but it may have to be alloy.

http://www.multihulldesigns.com/designs_other/sp_235cargocat.htm

I am talking to another  group about it now. It would be very easily driven, and have much less draft than usual ships. 

On this cat, displacement would be 864,000 lbs per hull.  Draft 7′ and power to go hull speed 1050 hp per hull.  That speed is 23 knots, but as the hulls are narrower than 1/12, it could easily go much faster.