Abstract
A vessel must navigate along designated routes within a harbor area to ensure navigation safety. The impact of strong currents is one of the most dangerous factors in coastal navigation. However, it is challenging to determine the deviation of a ship in advance from the ship’s position data in the case of a marine accident. In this study, to support the decision-making of ship navigators and vessel traffic service (VTS) operators in track monitoring tasks, tracks were classified according to the tidal stream, and the track distribution was analyzed according to the tidal current situations. Marine accident analysis was performed to investigate the tidal influence on ship tracks. Track data were collected for 12 months from a VTS center in Korea, and tidal information was collected through a meteorological observation buoy. Representative tracks were extracted from the track data using the support vector regression (SVR) seaway model. K-fold cross-validation and a grid search were performed to determine the optimal parameters. The ship tracks appeared in specific patterns according to the forces and directions of tidal currents, and specific deviation patterns were observed. This study is expected to contribute to the reduction of marine accidents by predicting ship trajectories according to the tidal situations in advance.
Highlights
In recent years, it has become possible to use ship navigational data and real-time marine environmental data for traffic analysis, with the advancement of maritime information and communication technology
The results of marine traffic analysis contribute to the development of the vessel traffic services (VTS) monitoring system and navigational decision-making equipment applications, which are used for the prevention of potential marine accidents
The results show that the force of the current has a significant effect on the ship deviation (p = 0.040 < 0.05), and, as the tidal current increases (B = 58.057), the ship tracks are formed outside the route
Summary
It has become possible to use ship navigational data and real-time marine environmental data for traffic analysis, with the advancement of maritime information and communication technology. The results of marine traffic analysis contribute to the development of the vessel traffic services (VTS) monitoring system and navigational decision-making equipment applications, which are used for the prevention of potential marine accidents. To prevent potential marine accidents and maximize the efficiency of ship navigation, it is recommended that ships be navigated through designated routes in the port and its approaching waters, and a VTS system be installed and operated. VTS has been established by authorized governments in necessary areas to promote safe and efficient navigation and prevent marine accidents according to the International Convention for the Safety of Life at Sea 1974 (SOLAS 1974)
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