单项选择题
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
单项选择题 All NAVTEX messages（）owing to their nature of importance.
单项选择题 The difference between international and national Navtex Service is limited to（）.
单项选择题 A Navtex station in each NAVAREA is usually allowed to have（）for transmission.
