Analysis of Navigation for Entire Ship Voyage in Seto Inland Sea Using Automatic Identification System Data

摘要

This paper presented the results of an important reference investigation on ship navigation across the entire Seto Inland Sea. Because the analysis utilized AIS data, the real navigation situation of ships was understood. The analysis results can help operators avoid congestion, and navigate efficiently in the inland sea. The main analysis results for the actual situation of ships are as follows: 1.The ship traffic in the Seto Inland Sea was determined. 2. Based on the analysis of the AIS data, we successfully extracted the navigation routes of ships sailing between Kanmon and Osaka. 3. The ship operations were analyzed specifically according to the encounter situation. Consequently, we found that ships were at a high collision risk when operating in the Seto Inland Sea. 4. Based on the analysis of the density distribution, we determined the risk areas at specific times in the Seto Inland Sea. In particular, the operating trends of various ship categories became clear. The results of this study could be applied to ensure safe navigation and the development of an efficient and economic navigation schedule.