They learn to dive without the help of an oxygen tank. They are also trained to share an oxygen tank with several others while remaining submerged for hours. On the sea, they are taught to maneuver rubber boats while combating the enemy and detonating targets.
在海上，除了游泳訓練外，還有潛水﹘﹘不靠氧氣筒、或者幾人合用一個氧氣筒而仍能悶在水中生存的水肺訓練，以及操作快艇、頂艇、衝艇、鬥艇、水中爆破，與觀察潮汐變化的水汶偵察訓練等。