A China's firm, which is building four of the world's leading subsea support vessels for Maersk Supply Service, delivered the first of those four, the Maersk Installer, in Dalian on Oct. 18 .

This ship is by far the largest, most expensive and sophisticated vessel Maersk Supply Service has ever ordered or taken delivery of in its 50-year history, said Peter Jacobsen, chief technical officer of Maersk Supply Service.

The vessel is 137 meters long and 27 meters wide and offers 1,850 square meters of cargo deck. It can carry out module replacement and inspection to facilities at 3,000 meters below the surface as well as subsea construction work, offshore lifting, and maritime fire rescue work.