Study on economic and social benefits of the FRP ocean fishing vessels

Ocean fishing is one of the most important parts of the fishery economy in China. After more than 20 years of development, China has developed into one of the major ocean fishing countries in the world. However, due to the influence of natural laws at home and abroad, China＇s deep-sea fisheries have been faced with difficulties such as rising costs, increasing competition pressure on fishery resources and backward fishery equipment. In recent years, the development of ocean fishing has faced many difficulties. Therefore, this paper analyzes the economic and social benefits of the steel ocean fishing vessel and the glass and steel ocean fishing vessel. It has reached the aim of providing theoretical support for the new development direction of ocean fishing in China. Among them, the economic benefits are mainly compared and analyzed from four aspects of the maintenance fee, depreciation, fuel consumption and operational efficiency. Social benefits are mainly embodied in the aspects of energy saving, emission reduction, increasing consumption and reducing consumption, protecting resources and environment, ensuring the safety of fishermen at sea, optimizing the structure of fishery industry, and promoting standardization of fishing vessels. Through the analysis of these two aspects, the advantage and the obvious gain effect of the FRP ocean fishing vessel are fully proved. The FRP ocean fishing vessels can be realized more quickly by the enterprises built and used. Finally, it can promote the development of ocean FRP Ocean fishing vessels in China.

Study on Net Hauler Safety Device for Fishing Vessels

[Objective] To design a safety device set for fishing vessel net hauler, in order to reduce the severe potential safety hazards in offshore operation. [Method] In view of the operation and structure of net hauler on the fishing trawler, this paper investigated the existing safety protection devices and designed a new set of purely mechanical structure without changing the original structures of the vessel significantly. [Result] Using the easily-adjustable functions of the main shaft of CNC lathe, and simulating the operation performance of different hauling line speeds and testing the safety device, the results showed that the new device could protect the crew from safety accidents caused by net hauler. [Conclusion] The result provides references for the design and application of mechanical protection devices for net haulers on other fishing trawlers.

Contribution of Human Factors to Fishing Vessel Accidents and Near Misses in the UK

The research paper in hand presents a thorough exploration of the fishing vessel accidents and near misses in the UK fishing industry as well as the underlying human element factors and sub-factors contributing to them. In this respect, the regulatory regime in the fishing industry both at a national and international level is initially examined while also complemented by the investigation of past research efforts to address these issues. Furthermore, the analysis of the fishing vessels accidents and near misses as recorded in the UK MAIB （Marine Accident Investigation Branch） database for a period of 19 years is performed in order to derive the very causal factors leading to the fishing vessel accidents. It is initially shown that the fatalities and injuries taking place due to fishing vessels＇ accidents have alarmingly remained unchanged over the last 15-20 years. Another key finding is that the number of accidents and near misses per day and night shifis is quite similar while most accidents take place in coastal waters. Furthermore, human factors are related to the vast majority of fishing vessels accidents with the principal ones referring to ＂non-compliance＇, ＂equipment misuse or poorly designed＂, ＂training＂ and ＂competence＂. Finally, remedial measures are also suggested in order to address the main accident causes identified.

Ship Roll Analysis Using CFD-Derived Roll Damping:Numerical and Experimental Study

This study investigates the roll decay of a fishing vessel by experiments and computational fluid dynamics(CFD)simulations.A fishing vessel roll decay is tested experimentally for different initial roll angles.The roll decay is also simulated numerically by CFD simulations and is validated against the experimental results.It shows that the roll damping could be obtained by CFD with high level of accuracy.The linear and nonlinear damping terms are extracted from the CFD roll decay results and are used in a potential-based solver.In this way we are using a hybrid solver that benefits the accuracy of the CFD results in terms of roll damping estimation and the fast computations of the potential-based solver at the same time.This hybrid method is used for reproducing the free roll decays at Fn=0 and also in analyzing some cases in waves.The experiments,CFD and the hybrid parts are described in detail.It is shown that the suggested method is capable of doing the simulations in a very short time with high level of accuracy.This strategy could be used for many seakeeping analyses.