heading indicator

例句：

1. 1. The new car has a heading indicator that shows the direction of travel.
   新车有一个指向仪，显示行驶方向。
2. 2. The pilot used the heading indicator to guide the plane safely through the fog.
   飞行员使用指向仪指导飞机安全穿越雾区。
3. 3.The navigation system in the car uses a heading indicator to help drivers find their way.
   汽车的导航系统使用指向仪帮助司机找到路线。