Aimed at the problem that torpedo can not be guided to wake accurately, the past-bearings guidance methods for wire-guided + wake-homing torpedo has been researched. The past-bearings guidance methods and the selection of entry point had been introduced. After amending past-time which is based on consider guidance-time interval to guide torpedo to expectant position. The result shows that the method is correctable and practicable. It can guide torpedo to specified wake exactly no matter target how to move.%针对鱼雷不能准确地进入尾流问题，对线导+尾流自导鱼雷攻击过程中过去方位法的导引问题进行研究。介绍过去方位导引法，选择进入点，在考虑导引间隔的基础上对过去时间进行修正后，将鱼雷导向过去方位线。结果表明：该方法是正确、可行的，不管目标如何机动，都能将鱼雷准确地导入到指定尾流进入点。
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