A view of the the N999 Tortue, the world's largest natural gas floating production storage and offloading vessel. [Photo/WeChat account: qidongfabu]

The construction of the N999 Tortue, the world's largest natural gas floating production storage and offloading vessel, was completed on Sept 9 in Qidong, Nantong, East China's Jiangsu province.

The vessel was constructed by COSCO Shipping (Qidong) Offshore Co Ltd for BP p.l.c.

The vessel has a gas processing capacity of 500 million standard cubic feet per day.

It is 270 meters long, 54m wide and 31.5m deep. It is the size of two football fields and the height of a 10-story building. It is designed to be used for 30 years, with a maximum displacement of about 320,000 metric tons and a storage capacity of at least 1.44 million barrels of oil.

The vessel's living area is about 22m long, 41m wide and 32m high, and can accommodate 140 people.