Taiwan's surrounding waters rich in terrain, and a number of shares of the sea converge along the coastal waters of Taiwan created a rich fishing ground.However, due to excessive fishing efforts to longterm investment , But lack of proper management of fitness , so even though the number of vessels increased, but the overall fishery production continued to decrease. The management of fisheries resources requires the correct results as the scientific basis for resource assessment , before they can properly apply effective management to achieve goals , and resources conservation and use of a balance between fisheries. The correct resource assessment,you need detailed information on the basis of the catch,the most important time, space and other efforts to catch the amount of information is the most common practitioners of business operating statements made . Taiwan's coastal fisheries,as yet mandatory for the industry to report their operating statements provided management measures , so in the past this type of information is achieved through the visits, but the mission is not only the high cost of information , a small number and accuracy is not high also limited to the funding and cooperation from the fishermen often intermittent , resulting in a serious ack of resources and ssessmenta information. Taiwan Caost Guard Administrstion in order to monitor the waters around Taiwan ,the dynamic vessel offshore the coast of Taiwan are build Caost Radar Systems.These systems approach to proactive scanning , within 24 hours for the scan to monitor vessels and left navigation records including the vessel name , time location information of the vessel .These data separated by fishing information , speed of calculation,it is possible to estimate the fishing vessels fishing effort in the future with the sale of the ships coming into port unloading data information on fishing operations as an alternative complementary information on the shortcomings of the report did not work . The purpose of this study , that Caost Radar Systems in the use of bank information obtained , isolated fishing information , conduct analysis and calculation , and the actual data for verification visits to explore the application of Caost Radar Systems on shore along the coastal fisheries management feasibility . The results showed : Caost Radar Systems data from the isolated shore fishing vessels that the correct information to the operating position, and velocity analysis based on fishing operations , can estimate fishing effort,and calculate the frequency of operating out of position, draw fishing boats operating region .But the study also found the sea wave and blind area factor will be off the lock occur ,resulting in boat speed and position information a short time gaps , but this does not affect the overall assessment of fishery resoures, through projections to supplement the information in this section.

Dongsha Island has Taiwan¡¦s only well developed and integrated coral atoll ecosystem. The numbers of fish species and coral varieties in its waters have topped 679 and 286 respectively, which illustrates its biodiversity and wealth of fishery resources; therefore, it has drawn plenty of Chinese fishing boats to illegally enter into the area for fishing. Over the years, the fishery resources and terrain ecology of the Dongsha Island have been damaged as a result of illegal fishing. On the other hand, even though Taiwan¡¦s Coast Guard Administration in charge of patrolling the waters of the Dongsha Marine National Park, due to the vast sea area and varying depths of the atoll, the effect of the law enforcement on the vessels is limited, and cannot provide effective deterrence. By using existing information technology to gain knowledge on the distribution of the Chinese fishing boats, this study proposes to make the most of the limited law enforcement capacity to enhance the efficiency of law enforcement. With the coastal radar station established by Taiwan¡¦s Coast Guard Administration in 2003, this study scanned the waters around the clock and digitally journalized the data regarding times and locations of the voyages of the fishing boats, to further explore the time and space distribution of the Chinese fishing boats at the Dongsha atoll. Based on the annual, quarterly, monthly, day to night and tidal periods, five periods in total, this study used the Geographic Information System (GIS) to map out the distribution of the Chinese fishing boats, and probed into the distribution patterns in different times and spaces. The results will provide a scientific reference for law enforcement; it is hoped that the law will be effectively enforced and the ecological environment will be well preserved under limited resources. The study results indicate that the Chinese fishing boats operating at the Dongsha atoll are mainly small boats; a large boat can carry 10 to 30 small boats. Furthermore, the fishery catches are mainly live fish, sea cucumbers and conches, and are mostly carried back to the port by transport vessels for sale. The Chinese fishing boats often gather at two hot spots of the south atoll platform and the north atoll platform. In terms of the distribution of seasonal gathering, the study found that most of the Chinese fishing boats return home for the Chinese New Year holiday, the gathering density is higher during full moon periods and the gathering may slightly move towards the north when affected by the southwest monsoon. These results can serve as an important reference for Dongsha Marine National Park¡¦s resource management and Coast Guard Administration¡¦s sea area law enforcement.