海军电子战的范围广、功能多,各种功能都直接或间接地用于舰艇防卫。电子战利用和压制敌人使用电磁频谱,而保护己方电磁频谱的使用。电子战通常分为信号情报(SIGINT)、电子支援措施(ESM)、电子对抗(ECM)和电子反对抗(ECCM)四大部分。信号情报和电子支援措施用作截获、分析、识别和定位敌人的或潜在敌人的发射频谱。信号情报本来是非时间限制的和有战略意义的,而电子支援措施是战术性质的,但由于来自主要电子情报系统的信息正在广泛应用于战术,时间上的差别已经不明显。由于具有测向能力的密码系统能够提供战术重要信息,所以通信情报和通信支援措施之间的差别不总是很明显。虽然总的倾向是跨越整个 Naval EW has a wide range of functions and many kinds of functions are directly or indirectly used for naval defenses. Electronic warfare uses and suppresses enemies to use the electromagnetic spectrum while protecting the use of their own electromagnetic spectrum. Electronic warfare is usually divided into four parts: SIGINT, ESM, ECM and ECCM. Signal intelligence and electronic support measures are used to capture, analyze, identify and locate the emission spectrum of an enemy or potential enemy. Signal intelligence was originally non-time-limited and strategic, and electronic support measures were tactical, but since the information from the major electronic intelligence systems is being widely used in tactics, the time difference has not been obvious. Since directional systems with cryptographic capabilities provide tactical vital information, the difference between communications intelligence and communications support measures is not always obvious. Although the general tendency is to span the whole