navigation aids是什么意思

navigation aids
导航辅助设备，助航设备，航行标志
例句：

The Workshop noted that, while the basic GPS had many advantages over conventional navigation aids, such as distance-measuring equipment stations, radio navigation systems, and LORAN C, it still had some limitations.
讲习班注意到，尽管基本的全球定位系统与距离测量设备台站、无线电导航系统和LORAN C等常规导航辅助设备相比有许多优势，但仍有某种局限性。

international marine radio aids to navigation
国际船用无线电导航设备国际航海无线电助航设备

The paper also expounds the significant influence of the technology on the modification and development of traditional navigation aids.
这对传统航标的改造和发展将产生重大的影响。