A two-masted fore - and-aft-rigged sailing vessel similar to the ketch but having a smaller jigger mast stepped abaft the rudder.
双桅帆船一种有纵帆装置的双桅航船，类似于双桅纵帆船，但在船尾的船舵放置有一种较小的补助帆桅。
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。
Coppery rudder bush loosen and corrosion of rudder bracket are found frequently when vessel is in repair.
修船中常会遇到铜质舵承出现松动，舵承座孔被腐蚀的情况。
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