The aquaculture ship is one of the core equipment for the development of deep sea aquaculture, and the large aquaculture ship using recirculating water technology is one of the main technical route for the development of aquaculture ships in China. With recirculating water aquaculture system as the core, the factory aquaculture technology is adopted to improve the application scope and industrialization level of the aquaculture equipment. In view of the characteristics of this type of ship, a general design idea is proposed based on the development of some 80,000 m³ aquaculture ship, which focuses on the general arrangement, system design, structural design and overall performance analysis by taking the recirculating aquaculture system as the core. The design points of the recirculating aquaculture system, the water intake system, and the aquaculture comprehensive management and control system are discussed to provide references for the subsequent design of this type of ship.

Marine crane can be used in all kinds of ships as it has various types, large lifting capacity, excellent performance and wide application. As one of the indispensable supporting equipment for modern ships, it plays an important role in the shipping industry. The principles, procedures and precautions of the selection and layout of marine cranes have been comprehensively and systematically analyzed. The simplified modelling of the crane is established to clarify the principle and the procedure of the selection and layout of the crane, as well as summarize the review points of the three-dimensional (3D) layout of the crane. The technicians can be instructed to quickly determine the location of the crane based on the layout method described in this paper, and also to quickly check the interference of the crane in 3D environment by using the 3D design software CATIA to verify the rationality of the crane location.