The analysis of statistical data from Korea Maritime Safety Tribunal says the incidence of marine accidents by small ship has increased, in spite of the fact that total number of the accidents caused by domestic vessels have decreased. This shows us that the navigational environment of small boat in coastal areas is more dangerous than that of large vessel, and also concludes that a way is needed to control the navigation of small boats near harbour or in coastal areas.
There are no suitable equipments in small boats mainly navigating in coastal areas, so it is said difficult for them to receive any useful information about safety navigation and to give information about their positions to the relevant authorities for rescue. Those problems may risk them especially in case of emergency such as sinking, fire and so on.
In this paper, a system was proposed to promote navigational safety of small boats and to increase efficiency of marine traffic control in coastal areas. With the proposed system, important navigational information could be sent to small boats navigating in coastal ares, so as for them to make proper actions to avoid dangerous situation. And also this system enables the relevant authorities such as VTS center to monitor and control movements of vessels in area of their jurisdiction.
This system uses CDMA technology, which is a modern and wildly used in most of industrial fields, and makes easy both services to provide useful information to vessels and to gather information about their locations for monitoring vessel traffics. The CDMA is said to be used only in short distance, not in long distance, from the locations of local base stations. However, through experiments which were carried out to find a possibility of usage in long range from local base stations located along coastal land areas, both its effectiveness and convenience of the proposed system have been found as useful to monitor and control movements of small boats in coastal sea areas.
This study consists of six chapters. The first chapter shows the purpose and outline of this study. The network & communication equipments installed on small boats are researched in the second and third chapter, and in the fourth chapter, analysis of those equipments described in the second and third chapter is shown. In the fifth chapter, results of both analysis under the consideration of effectiveness & convenience of the proposed system and its experiments are written, and finally the conclusion of this study is shown in the sixth chapter.