| In recent years, the shipping industry has been developed rapidly in China, but the aquatic security infrastructure is weak and the aquatic traffic management is nonstandard. Because overloading, seizing the fairway and navigating in fog occurred frequently, the traffic accidents of ship capsizing, sinking and colliding have became more and more, which cause huge economic losses and bring serious harm to the safety of people's lives. At present, a variety of traffic monitoring systems have been developed, but there is no ship monitoring system for harbor and freshwater area. To improve aquatic traffic management and control level, and avoid aquatic traffic accident, it is necessary to develop a new ship monitoring system.The thesis discusses the terminal of ship monitoring system, puts forward a general scheme of system, and develops the ship monitoring terminal by CDMA wireless communication technology and computer technology. The principles of GPS system and CDMA network are analysed. The terminal hardware is designed by AT91RM9200 processor, CDMA module, GPS module and audio module. The platform of application program in Embedded Linux OS is built, and PPP protocol is transplanted. The application program is developed, which includes CDMA wireless communication software using PPP and TCP protocol, GPS data receiving and analyzing software, and audio acquiring and playing software. The teminal is debugged and tested.The ship monitoring terminal communicates with monitoring center at real-time through CDMA wireless network accessing Internet. It fulfills the functions of transmiting ship position, course, speed, time and other data, receiving the instructions sent by monitoring center, and keeping touch with monitoring center by voice communication. The terminal realizes the ship monitoring and managing, improves the aquatic traffic management of the harbor and freshwater area ships efficiently, aviods the occurrence of aquatic traffic accidents and promotes navigation safety.
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