Submarines can independently make war from out at sea for a long period of time, being stealthy and versatile, with long endurance and high assault power, and not needing to seek assistance by sea or air.
海底隱憂重重潛艦隱密、機動、續航力長、攻擊力強，不須靠海、空支援，就能在海中長期獨立作戰。