On Nov. 28, with No.2 hook of the 600-tonnage gantry crane being loosed, Block 40A of H1351 was successfully keel-laid, which marks the forth PSV has successfully started her construction on Building Platform in SWS Offshore. With the shortage of working field, the employees at all levels work together to continuously explore new technique of ship construction. The Platform Area Construction Scheme of Two Lines for PSV was proposed, breaking the original construction pattern of "one whole-vessel and one half-vessel". So far, the vessel of H1340, H1350, and H1351 are erected on the area of 600 tons building platform, the resources of "Platform Area" are utilized effectively which also ensures the production task of PSV blocks in an orderly manner.