直線水路航行における昼夜操船困難性の比較評価

概要

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There are many of straits and channels near the Japanese coast. Navigating at these kinds of restricted and congested water-areas, it is more difficult for mariners to handle the ship at nighttime than at daytime. This research aims at studying on the reduction of ship-handling difficulty in the channel due to nighttime. In this paper, on the base of our past study on the difference of mariner's perception of safety (when approaching to a shore and encountering with other ship) at daytime and nighttime, the nighttime version of Environmental Stress Model was made, and using this new model, the difficulty of ship handling at nighttime is evaluated quantitatively. In order to evaluate comparatively the ship-handling difficulty at daytime and nighttime in the straight channels with different width, the marine traffic simulation was carried out. About the simulation, two kinds of traffic flow were considered: one-way and two-way. Based on the result of simulation, the ship-handling difficulty at daytime and nighttime was calculated, and the measures to reduce the ship-handling difficulty at nighttime was analyzed from the aspects of 1) Slowdown, 2) Reduce the congestion of marine traffic, 3) Extend the width of channel.
社団法人日本航海学会の論文
2008-09-25