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http://dx.doi.org/10.7837/kosomes.2014.20.2.193

A Study on the Ship's Speed Control and Ship Handling at Myeongnayang Waterway  

Kim, Deug-Bong (Graduate School of Korea Maritime and Ocean University)
Jeong, Jae-Yong (Mokpo National Maritime University)
Park, Young-Soo (Korea Maritime and Ocean University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.20, no.2, 2014 , pp. 193-201 More about this Journal
Abstract
This study provided safe sailing speed and appropriate passing time to areas of known strong current water to prevent marine accident of the ships. To the interpretation of these data which target Myeongnyang waterway, AIS data of the ship was collected from $12^{th}$ July to $15^{th}$ July 2010 and site environment was investigated on $4^{th}$ September 2010. On the basis of the collected data, the 'Minimum Navigation Speed' and 'Optimum Navigation Speed' were calculated. It has also considered the 'Spare control force' or allowance and the 'Respond Rudder Angle' for each tidal current speed. Additionally, it suggested the safe passing time to strong current area by analyzing tidal level and tidal current speed. The conclusion of the research are as follows : (1) If the flow rate is greater than 4.4 kn, it is difficult for the model ship to control herself by her own steering power and to cope with tidal current pressure force and yaw moment caused by the tidal current.. (2) The minimum navigation speed should be over 2.3 times the tidal current and the optimum navigation speed should be over 4.0 times the tidal current. (3) When spring tide, the optimum passing time at Myeongnyang waterway is between 30 minutes to 1 hour before the time of high/low water, and at 5 hours after high/low water, passing of ships should be avoided because it is time when the flow rate is over 4 kn.
Keywords
Strong tidal current; Current force; Turning moment; Minimum navigation speed; Optimum navigation speed; Respond rudder angle;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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