Turning Performance of Bow and Stern Thrusters Equipped on the Training Ship Nagasaki Maru

摘要

Instruments for determining ship position (e.g., DGPS) have been made progress on precision of positioning and measurement. Due to these improvements, accurate ship handling more requires. In this study, moving distance and turning rate by thruster drive equipped on the training ship “Nagasaki Maru”, Faculty of Fisheries, Nagasaki University, Japan, were determined. Maximum moving distance was recorded with stern thruster, and increased threefold as compared to that with both thrusters. Minimum turning rate was also recorded with stern thruster, and halved as compared to that with both thrusters. Among levorotation and dextrorotation, there were no differences in turning rate, but differences in moving distance owing to directions of wind and discharge of thrusters. These information should lead to improve watermanship skills of crews.