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潜艇与水面舰船虽然都属于军用舰艇范畴,但它们的航行却截然不同。舰船的航行仅限于水面上的两维运动,其运动空间存在着空气与水这两种不同介质形成的界面。处于水下状态的潜艇,则进行三维运动,其航行范围是单一的海水介质环境。因此,潜艇上除了装备舰船上用于控制方向的垂直舵之外,还必须装备改变潜艇在水下深度以及使潜艇保持在某一深度的水平舵。早期潜艇上只有一套水平
Although submarines and surface ships belong to the category of military ships, but their sailing are completely different. The navigating of the ship is limited to the two-dimensional movement on the water surface, and the movement space has the interface formed by two different media of air and water. Underwater submarines, the three-dimensional movement, the scope of its navigation is a single marine media environment. Therefore, in addition to equipping the submarine with the vertical rudder used to control the direction of the ship, a submarine must be equipped with a horizontal rudder to change the depth of the submarine and maintain the submarine at a certain depth. Early submarines only a set of levels