Mitsui OSK Lines Ltd announced that its group company Phoenix Tankers Pte Ltd signed a deal with Namura Shipbuilding Co Ltd for construction of two very large gas carriers to transport liquefied petroleum gas and ammonia. Namura Shipbuilding will construct the two vessels at its Imari Shipyard, under a technical tie-up with Mitsubishi Shipbuilding Co Ltd. The vessels, which can also run on LPG fuel, are slated for delivery in succession after 2023.LOA - 230.0mBreadth - 36.6mDraft - 12.0mCapacity - About 87,000m3Main Engine - Mitsui-MAN 6G60ME-C10.5-LGIPLPG, as fuel, can reduce CO2 emissions by about 20%, and SOx, PM, and so on by about 90% in comparison with fuel oil. The new carriers are designed to maximize fuel efficiency, and are cutting-edge environmental-friendly vessels in conformity with EEDI Phase 3 which will be applicable for VLGCs contracted after 2022.Ammonia is drawing attention as a next-generation clean fuel that does not emit carbon dioxide when burned, and as "hydrogen carrier" that can be used to transport hydrogen. The newly ordered vessels are also designed to transport ammonia, and are presently the world's largest-scale ammonia carriers. Furthermore, the vessels will be built with an eye toward conversion to ammonia fuelled in the future because LPG and ammonia fuels have similar characteristics.