It is possible for ships to receive safety message transmitted by Navtex station _________.
A. in any INMARSAT regions
B. in each NAVAREA
C. at any distance
D. in Areas A3 and A4
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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
_________ 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.
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