对于航行水中的船舶,尾部的舵是十分重要、绝对不可缺少的专用设备。它有两大功能:一是确保船舶按照既定航向行驶,即航行稳定性;二是随机变更船舶运行方向,航行术语称为回转性。不能想象,一艘航行在江海中的船舶,如果没有舵的操纵与掌控,任凭狂风怒浪肆意摆布,那将面临怎样的危险,不要说安全抵达预定港口,即便是正常运行也将没有可能。诗中前两句所叙述的,恰好是舵的这两种功能:在风平浪静的水面上,舵能使船平稳持重,保持常态,正常运行;到了遭遇巨大 For ships sailing the water, the tail of the rudder is very important, absolutely indispensable special equipment. It has two major functions: First, to ensure that the ship travels in accordance with the established course, that is, the stability of navigation; second is to randomly change the direction of operation of the ship, navigation terms called rotary. Can not imagine a ship sailing in the sea without the rudder control and control, in spite of wind and waves wanton mercy, that will face the danger, not to say that the safe arrival of the scheduled port, even if normal operation will not be possible. The first two sentences of the poem describe precisely these two functions of the rudder: on a calm sea, the rudder can make the ship steady and steady, maintain normality and normal operation,