To ensure the vessel voyage along the predetermined course, the rudder Angle should be changed reasonably at the right moment according to the various leeway circumstances.
为使船舶沿预定的航向航行，应根据船舶偏离航向的情况适时合理地改变舵角以修正航向。
2
But we need to use rudder to correct our heading in line with the runway at the right moment of touchdown or we will run out of runway.
在接地的一瞬间，利用方向舵控制飞机使机头指向与中心线重合，以防止飞机冲出跑道。
3
This paper introduces the bending moment and shearing force calculation formula of rudder and rudderstock according to the model required by classification society.