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Fiber Reinforced Plastics (FRP) and composites (CM) is an ideal new structural/functional material.It has excellent integrated performances which are better than the traditional homogeneous materials.With the promotion of the traditional shipbuilding countries in recent years, FRP/CM has obvious development in marine applications.By now the unique hull raw materials, design concepts, fabrication methods and non-destructive testing techniques for FRP vessel have been developed.Firstly, the comprehensive introductions of hull raw materials including different fiber reinforcements, matrix resins and various core materials were given in this paper.Secondly, the design concepts, design methods and structure styles of composite crafts were introduced.Thirdly, the manufacturing technology and quality control of FRP ship structures were presented.Finally, several applications of composite materials in ships and boats, especially in high performance vessels were illustrated.The conclusion was that FRP was the most suitable material for hull and superstructure of small and medium vessels.