鱼群探测仪(英语:fishfinder)或探鱼器是一种识别和探测水中鱼类和其它物体位置的声纳设备,主要用于捕鱼活动。探鱼器通过水下声音传播和回声反射来确定物体距离和形状、探测和识别水里物体和轮廓,强声波从传感器出来传达到水里,返回到探测器,液晶屏显示波形,波形就是鱼群状况,可以让捕鱼者和钓鱼者准确判断鱼群的数量和栖息的深度[1]。现代电子技术允许探鱼器在船用雷达、指南针和全球定位系统(GPS)导航系统之间高度集成。
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