CHEN Han-bao

（Tianjin Research Institute for Water Transport Engineering，Key Laboratory of Engineering Sediment of Ministry of Communications，Tianjin 300456，China）

With the advantages on rapid construction，no limitation of extent，less influence on environment，the VLFS has been turned into the focus of coastal and offshore engineering studying.As the platform，VLFS was built as airport，huge oil house etc，and would play the role of ocean economics，politics and military.The restrictive condition of VLFS is strong wave by monsoon，seismic，serious bomb etc.The floating breakwater should be put forward to shelter VLFS.The analysis of wave condition including typhoon route，archipelago and water depth is performed in this paper.The advantage and disadvantage are compared between VLFS and the marine structure from land.

VLFS；wave condition；marine structure