針路不安定な船舶の操縦性能の主観的評価について

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The appearance of the ships with remarkably bad maneuverability became a problem in the late 1980's. To eliminate the bad maneuverability ships, IMO adopted interim maneuverability standard A751 (18) which prescribed for minimum maneuverability performances in 1993. The review work of the interim standard was carried out in 2001. As a part of the review work, a simulator study concerning the ship handling difficulty with four different performance ships carried out to examine the course keeping performance, and to examine the rationality of the standard. The simulator study was performed in the west route of the Kurushima Strait and experienced pilots evaluated the ship handling difficulty of each ship. The recorded simulator data was also analysed to examine indices, which express the relation between ship maneuverability performance and subjective ratings of ship handling difficulty. A high correlation was found in the relationship between the subjective ratings concerning the ship handling difficulty and the spiral loop width and the rate of counter rudder operated time. It could be confirmed that the bigger the spiral loop width and the rate of counter rudder operated time are, the bigger the ship handling difficulty is. From the subjective evaluation, we concluded that the ship with bad course keeping ability worse than the B type ship, in other words with spiral loop width bigger than 6.1 degrees should make it outside of the standard.
社団法人日本航海学会の論文
2003-03-25

針路不安定な船舶の操縦性能の主観的評価について

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