Mitsui O.S.K. Lines has begun an onshore demonstration test of a new prototype sailing rig that they believe has great potential for reducing vessel CO2 emissions. MOL/ Akishima Laboratories (Mitsui Zosen) tests of the "Power Assist Sail" were started at the Mitsui Engineering & Shipbuilding Co., Ltd. (MES) Oita Works in June 2013. The joint study of the Power Assist Sail, has produced the prototype for the demonstration test, which is large enough to use on an actual vessel.