雷达诞生以前 史上最早“人肉搜索”(图)
雷达诞生以前,各国在战争中只能依靠人工对舰船飞机等目标进行搜索,但目视距离毕竟有限,并且也受到天气条件的极大限制,于是利用声响来确认目标的各种造型怪异的“顺风耳”就应运而生。虽然由于技术的局限,这些设备的探测范围并不远,但鉴于当时能够进行超视距攻击的导弹还没有出世,飞机空袭必须抵近目标上空,它们在实际运用中还是发挥了一定的作用。http://img.secretchina.com/dat/media/21/2008/11/16/20081116094959667.jpg
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