潜艇是一种既能在水面航行,又能潜入水中某一深度进行机动作战的舰艇,也称潜水艇,是海军的主要舰种之一。大型潜艇多为圆柱形,艇身中部通常设立一个垂直结构(舰桥),内有通讯设备、感应器、潜望镜和控制设备等。自第一次世界大战后,潜艇得到广泛运用,在许多大国的海军中占据重要位置,其功能包括攻击敌人军舰或潜艇、近岸保护、突破封 A submarine is a kind of naval vessel that can sail both on the water surface and submerge to some depth in the water. It is also called a submarine and is one of the main naval vessels. Large submarines are mostly cylindrical, the middle of the hull usually set up a vertical structure (bridge), there are communications equipment, sensors, periscope and control equipment. Since the First World War, the submarine has been widely used and occupies a prominent place among the navies of many major powers. Its functions include assault on enemy warships or submarines, coastal protection, breakout of seals