A 20% savings in fuel efficiency for a two-day retrofit is nothing to sneeze at, and that explains why the leading cargo shipper Kawasaki Kisen Kaisha, Ltd. is adding more wind power punch to its existing roster of cargo ships. The company has just ordered another three Seawing sails from the company Airseas on top of a previous order. Better yet, from a carbon-cutting perspective, "K" Line also expects to leverage artificial intelligence to squeeze even more clean power from centuries-old seagoing technology. If the name Airseas rings a bell, that's probably because of the connection to the well known aircraft maker Airbus. Airseas sailed across the CleanTechnica radar last fall, when we noted that it was founded by former engineers at Airbus (for the record, it is also funded and supported by Airbus, the EU, and other partners).