要击毁敌舰,就必须预先知道它的位置。由于现代化舰船的航程和舰载武器的射程大大增加,以及现代潜艇的续航时间和作战能力大大增加,因而提出了一些问题。哈德森大学的国家安全研究室付主任诺曼·福里德曼研究了美苏现有的监视系统,并指出了它们的发展方向。 To destroy an enemy ship, you must know its position in advance. Due to the greatly increased range of modern ships and the range of ship-borne weapons and the substantial increase of the battery life and combat capability of modern submarines, some problems have been raised. Norman Freeman, head of the national security research unit at Hudson University, studied the existing surveillance systems in the United States and the Soviet Union and pointed out their direction of development.