pilot freqency

例句：

1. 1. The aircraft's pilot frequency is set to maintain a safe altitude.
   飞机的飞行员频率被设定为保持安全高度。
2. 2.The radar system uses pilot frequencies to detect and track enemy aircraft.
   雷达系统使用飞行员频率来探测和跟踪敌机。
3. 3.The ship's navigational equipment operates on a range of pilot frequencies.
   该船的导航设备操作在一系列飞行员频率上。