IHI has been the leader in the field of building large-size tankers and has been playing an important role in rationalizing ocean transport, and now IHI, as the world's leading builder of large-size double hull tankers and containerships of the new generation, continues to offer new ideas and concepts in ship designs. In the shipbuilding field, IHI's technological innovation includes a long list of achievements such as: LNG ships based on the uniquely developed SPB tank system; F-series ships that introduced a new construction method to the world through the application of the series production concept for the standardized design ships; energy-saving technology represented by development of contra-rotating propellers; and super high-speed ferries having a super slender hull form. IHI's technological innovation still continues today for achievement of more economical and efficient ocean transport. IHI also has a good track record in building cruise ships and meteorological survey ships. IHI's technologies accumulated through engineering and construction of a wide variety of ships covering patrol boats for coastguard fleet and naval vessels, as well as offshore structure units such as FPSOs and FSOs are always updated to cater to various market needs. IHI has constructed the first offshore oil drilling equipment (rigs) in Japan, artificial island ice sea rigs, world's largest semi-submerged rigs, floating refinery / storage facilities, and various plant barges. IHI also has constructed various work vessels such as crane ships, dredging boats, concrete plant ships, piling ships, etc.