radio navigational aids
无线电导航辅助设备
short distance navigational aids
短距离导航援助设备
The crash was a direct result of inadequate navigational aids.
坠机是导航不力的直接后果。
It is impossible to navigate safely without these navigational aids.
如果没有这些助航设备, 安全航行是不可能的。
These virtual folders serve only as organizational and navigational aids.
这些虚拟文件夹仅仅起到组织和定位得作用。
it shall be forbidden to damage navigation aids or navigational facilities.
禁止损坏助航标志和导航设施。
No objects adversely affecting the efficacy of navigational aids may be erected around them.
第二十八条助航标志周围不得建造影响其效能得物体。
The earthquake caused changes to the topography of the ocean floor and destroyed a number of navigational aids.
地震改变了海底地貌并破坏了一些助航设备。
Any lights in the vicinity of the navigation aids or navigational lanes that jeopardize navigation safety shall be properly screened.
航标和航道附近有碍航行安全的灯光, 应当妥善遮蔽。
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