ZHOUSHAN, China–(BUSINESS WIRE)–Comparable to a light aircraft carrier! China’s largest submarine cable construction ship developed independently by State Grid Corporation of China for Guojiao No. 1 Brand was launched on November 9.

The ship has a cable-carrying capacity of 10,000 tons and a displacement of 24,000 tons, with the largest displacement among all the submarine cable construction ships in China, comparable to a light aircraft carrier. It can be loaded with 75-km three-core AC 220kV submarine cable, 130-km single-core DC 300kV submarine cable, or 2,000-km communication optical cable. With the capability to lay and overhaul submarine cables in deep and open seas, it effectively improves China’s level of marine power transmission equipment and technology.

The submarine cables buried by the ship will be the deepest in the whole world. It is equipped with the most advanced domestic towed water-spray cable burying machine, the maximum buried depth is 4.5m, which can better protect submarine cables from anchorage loss.

Such ship has the most powerful positioning capability in the world and the highest accuracy of submarine cable laying in China. The first catenary cable laying system in China independently developed by State Grid Corporation of China employs the world’s most advanced dynamic positioning technology, which can resist the attack of Class-9 wind and the impact of 4-throttle sea water, ensuring the laying of cables with constant tension and speed. The laying accuracy can be up to 0.5m.

Meanwhile, the longitudinal laying method is used in China for the first time, expanding the operating range by 40%. The ship is provided with a landing platform for helicopters, which provides operating conditions for the laying of submarine cables in the distant seas.

Qifan-19 will add a new pillar for Guojiao No.1 Brand. It will meet the requirements for the laying of power cables and communication cables in deep and open seas in China and Southeast Asia, boost the building of a marine power, expand the laying range of submarine cables from China to coastal countries along the Belt and Road, and promote the transformation of global energy to green and low-carbon energy.




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