Abstract
As AIS receiver can acquire ship-moving information on land, it is expected as a new device of a marine traffic investigation. This paper describes the system that does the safety evaluation in real time in the marine traffic continuously receiving ship-moving information by the AIS receiver, and using Environmental Stress model (ES model), which can evaluate ship-handling difficulty. The data of AIS, which was set on the roof of our College (height 20m), was received and acquired by the Toba National College of Maritime Techonology. We also designed and tested the automatic real-time analysis system using AIS and GPS receiver. And the system analyzes the ES model. The result of marine traffic observation for eight months in the Ise Bay had shown that there were ship-handling situation that exceeded the capacity of mariners, and a lot of those situations were appeared at IRAGO channel. When two cargo ships collided at the IRAGO misaki offing, we found that ES value higher than 750 was observed about seven minutes before the collision. And, it was shown that the developed system is useful for the safety management of the marine traffic.
