Recently, in case of large container ship, more than half numbers of total containers are stowed on deck and the project area above the ship's water line is more than three times of that below the water line, so that the air drag on the ship is not so small enough especially in rough sea. The wind tunnel test and CFD calculation was carried out in the various cases of the windshield and container stowage plan on the 6,700TEU container ship. From the experiment, the significant effect of air drag reduction is observed in case of putting the front windshield of dome shape, the side windshield blocking the spaces between every container bays, and the wing tail shape stowage in the bays on deck after accommodation house. By adopting these three ways of air drag reduction, more than 5% (average in a year) of the total fuel consumption will be saved in the real sea of North Pacific Ocean.
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