无线电助航设施图 radio facility chart
区域导航设施 Zonal guidance facility
目视助航设施 navigational visual aid
无线电归航设施 radio homing device
助航设施 Air navigational aid ; Aid navigation ; navigation aid facility ; navigational aids
通航设施 navigation installation ; navigation facilities
导航设施 NAVAID Navigational Aid
音响助航设施 audible aids to navigation
主要导航设施 [航] prime navaid facility
视觉助航设施 visible aid to navigation
内河航标是船舶在内河安全航行的重要助航设施。
Inland river navigation marks are important navigation aid facilities for safe navigation of vessels in inland rivers.
航标是航道的基础助航设施，直接影响船舶的航行安全。
Navigation system is the basic system on naval vessel that ensure them sailing safely.
航标是航道的基础助航设施，直接影响船舶的航行安全。
AtoN is the basic establishment of the sea-route for assisting navigation straightly effecting on the safety of shipping.
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