1944年6月4日,西非佛得角群岛附近海面上,由海军上校加勒里指挥的为美国航空母舰护航的战斗群正在航行。美军深知德国潜艇的狡诈,为安全起见,加勒里上校命令编队严密搜索潜艇。在雷达和声纳的监视下,一张猎潜网悄然展开了。不久,“查特林”驱逐舰声纳兵报告:“发现水下目标!”? On June 4, 1944, on the sea near the Cape Verde Islands in West Africa, the combat group escorted by the Navy captain Galleri for the United States aircraft carrier was sailing. The US military knows the blackmail of German submarines. For security reasons, Colonel Galleri commanded the formation to search closely for submarines. Under the radar and sonar surveillance, a hunting snorkeling net quietly unfolded. Soon, the “Chattling” destroyer sonar reported: “Find underwater targets!”