In order to develop an HNS safety management system to assess and visualize hazard levels via an automated method, we have conceptualized and configured a sample system. It is designed to quantify the risk of a vessel carrying HNS with a matrix method along navigational route and indicate hazards distribution with a contour map. The basic system which provides a visualized degree of hazards in real time has been introduced for the safe navigation of HNS ships. This is useful not only for decision making and circumstantial judgment but may also be utilized for HNS safety management with a risk base. Moreover, this system could be extended to address the navigational safety of marine traffic as well as of autonomous vessels in the near future if the sensors used are connected with IoT technology.

• Min-Gi Jeong(Graduate School, Korea Maritime and Ocean University, Busan 49112, Korea , 051-410-4836)
• Moonjin Lee(Korea Research Institute of Ships & Ocean Engineering/KIOST, Daejeon 34103, Korea)
• Eun-Bang Lee(Department of Coast Guard Studies, Korea Maritime and Ocean University, Busan 49112, Korea) Corresponding author