“River and Harbor Aid to Navigation System”的概念、定义、翻译、参考文献-科学参考

单词	River and Harbor Aid to Navigation System
释义	River and Harbor Aid to Navigation System [¦riv·ǝr ǝn ¦här·bǝr `ād tǝ ´nav·ǝ`gā·shǝn ´sis·tǝm] ^NAVIGATION An all-weather system for precision navigation in harbors and harbor entrances, which provides sufficient accuracy for vessels to proceed as if visual aids did not exist, with a 50-foot (15-meter) position radius accuracy requirement at a 95% confidence level. Abbreviated RIHANS.
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