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第二次世界大战爆发后,潜伏在大西洋运输线上的德国潜艇,恶狼般地频频出击,“扑食”盟国的军舰与商船。开始,由于盟国海军的反潜力量势单力薄,难以抵御德军潜艇凌厉的攻势。而盟军飞机当时完全依靠飞行员的目视搜索;水面舰艇尽管装设了声纳,但由于技术不过关,作用距离太短,对水下噪声分辨率低,难以发现德潜艇,致使己方被击沉的运输船越来越多。为此,盟军最高统帅部着了急,下令一定要把这些“水下鼹鼠”一网打尽。可是,要想消灭德国潜艇并非易事,除非另有高招。于是,盟军
After the outbreak of the Second World War, German submarines lurking in the Atlantic transport line attacked wickedly and frequently and wiped out warships and merchant ships in the allied nations. In the beginning, due to the weak anti-submarine forces of the Allied Navy, it was hard to resist the fierce attacks of the German submarines. Allied aircraft were completely dependent on the pilots visual search; surface ships, despite the installation of sonar, but due to technology, but the role of clearance is too short, the resolution of underwater noise is low, it is difficult to find German submarines, causing one’s own beaten Shen transport more and more ships. To this end, the supreme commander of the Allied forces took a hurry and ordered that these “underwater moles” must be drained. However, to destroy the German submarine is not easy, unless another brilliant move. So, the Allies