背景灯火の船舶運航への影響

概要

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When a vessel navigates along the coast at night, the look-out is one of the most important measures to ensure the navigational safety for the operator. Recently it is inevitable for the coastal lights to increase in a large amount with a great quantity of development of the coastal industries. At the same time, this causes the navigating vessels greatly and results in influence on the proper look-out. This report is the study of the background lights in Kobe Port which threatens greatly the safety of the vessels proceeding in and out, and the study of many collision cases caused by the background lights. The maximum luminance of the Port Island in Kobe Port observed from Ikari-Yama is 7cd/m^2. This value is approximately 900 times of the allowable limit. In addition, the 43% persons of 17 observers getting on a boat at a night point out that it is more difficult to sight the light of No. 1 Breakwater's East Light-house. According to this study of the collision cases, the first sight distance is shortened year after year. The authors conclude that it is more difficult to keep the proper look-out in and off harbor and coasting caused by the container yard's lighting, from these standpoints mentioned above, this paper points out some significant basis to improve the present marine traffic enviornment.
社団法人日本航海学会の論文
1994-09-25