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單項(xiàng)選擇題

The coordinated broadcast and automated reception of MSI via the INMARSAT EGC system using English to meet the requirements of the SOLAS Convention:（）.

A.international NAVTEX Service
B.FleetNET Service
C.SafetyNet Service
D.WWNWS

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單項(xiàng)選擇題

All NAVTEX messages（）owing to their nature of importance.

A.can suppress
B.can be suppressed
C.can not be suppressed
D.are to be suppressed

單項(xiàng)選擇題

The difference between international and national Navtex Service is limited to（）.

A.frequency allocated
B.both language and frequency
C.language used
D.transmission power and time

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