Home/American Shipper/OOCL puts more big ships on Intra-Asia American Shipper OOCL puts more big ships on Intra-Asia FreightWaves Staff · Wednesday, October 26, 2011 OOCL is increasing the vessel size it operates on its KTX 2 loop, linking Japan with South China and Thailand, from 2,742 TEUs to 4,562 TEUs. Its Japan to Singapore KTX 1 loop already has 4,500-TEU ships.