荒天錨泊中の振れ回り運動の抑止策について

概要

論文の詳細を見る
Undermentioned are considered effective methods to reduce the swing motion of a ship lying at single anchor in stormy weather. (1) Use of another bower anchor. (2) Use of main engine with rudder. (3) Use of bow thruster. Applying those methods, following results were obtained from this practical experiment. (1) Using another bower is not effective when wind velocity has exceeded certain level. (2) Continuous use of main engine is better than using it intermittently. When ahead engine is used with rudder, it is most preferable to keep the lowest r.p.m. that can get rudder effects. Astern engine may be used in such a way that the sternway is of nearly as same speed as the headway of swing motion. (3) When a bow thruster is available, it is recommendable to make it produce enough thrust to resist about 70% of the frontal wind pressure toward the ship. (4) On the occasion of anchoring in typhoon or stormy weather, it is better to use two anchors and veer out each cable equally against the change of wind direction and wave.
社団法人日本航海学会の論文
1983-09-25