What is the approximate range of VHF radio waves propagation?
A. 300 nautical miles
B. 30-50 nautical miles
C. 200 nautical miles
D. 400 nautical miles
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_________ belongs to satellite system to promulgate Maritime Safety Information.
AMVER.
B. NAVTEX.
C. SafetyNET.
D. Inmarsat-M SES
In general terms, all the media listed below are used to receive MSI, except _________.
A. NAVTEX.
B. HF NBDP.
C. SafetyNET.
D. MF/HF DSC.
Under the following conditions, for example, _________, a GMDSS ship is not allowed to depart from any port.
A. The vessel is not capable of performing all required distress and safety functions.
B. The vessel is carrying more than the required number of qualified GMDSS operators.
C. The vessel has a temporary waiver of its radio license and Safety Certificate.
D. The vessel is not carrying a GMDSS radio maintainer， but has provided for shore-side maintenance.
Regarding the capability of Class 2 INMARSAT-C MBS, the choice _________ is not true.
A. Two modes of operation (selected by the operator)， EGC and messaging， the other one is EGC Only.
B. And also capable of receiving EGC messages when not engaged in Inmarsat-C traffic.
C. Ready for EGC message reception exclusively (and not available in that mode for Inmarsat-C message transfer).
D. Ship-to-shore and shore-to-ship message transfer and distress alerting， but is not capable of receiving EGC messages.
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