无线电测向仪是利用环状天线的方向性来测定电波传输到船上的方向.它除可用来测定船位外,还可以用来导航及接近遇难船舶的呼救信号并测定其方位.渔船还常用于寻找高产渔船或引导本船驶向母船或船队. Radio direction finder is the use of the loop antenna to determine the direction of the radio waves transmitted to the ship’s direction. It can be used in addition to the determination of the ship, but also can be used to navigate and approach distress vessels distress signal and determine its position. Fishing boats are also commonly used Find high-yield fishing boats or guide our own boat to the mother ship or fleet.