单项选择题

The INMARSAT consists of（）major components.

A.4
B.9
C.8
D.5

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单项选择题

Why should the SES operators be very careful when the ship enters the area where three ocean regions overlap? Because（）.

A.the weather is always terrible
B.the condition there is complicated
C.the signals are too strong
D.their SES may recive the signals from unwanted satellite

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.

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