The frequency 518KHZ will be used to transmit（）and（）wanings in NAVTEX.<br>A:navigational / typhoon<br>B:traffic / meteorological<br>C:marine / hurricane<br>D:navigational / meteorological

The frequency 518KHZ will be used to transmit（）and（）wanings in NAVTEX.
A:navigational / typhoon
B:traffic / meteorological
C:marine / hurricane
D:navigational / meteorological

出自：海船船员证

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