VHF navigation system

例句：

1. 1. The VHF navigation system is used to guide ships through the open seas.
   甚高频导航系统用于引导船只穿越公海。
2. 2.The VHF navigation system was developed to improve communication in remote areas.
   甚高频导航系统被开发出来以改善偏远地区的通信。
3. 3. The VHF navigation system helps pilots maintain a safe distance from other vessels.
   甚高频导航系统帮助飞行员与其他船只保持安全距离。