Which bands does a ship station in distress alert other ships in its vicinity by DSC on?
A. High frequency and medium frequency band
B. Very high frequency and medium frequency band.
C. High frequency and Very high frequency
D. High frequency， medium frequency band and Very high frequency
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What must be entered, after the Shore (I.D.) and # sign is entered and a ring-back tone is heard, to obtain the intervention of the telephone operator in the INMARSAT Standard-F service?
A. 00
B. 01
C. 10
D. 11
The GMDSS is composed of _________.
A. satellite and terrestrial systems
B. only navigation and alerting systems
C. just MSI system and locating system
D. SAR co-ordination system
SOLAS vessels are able to communicate with shore stations _________.
A. no matter where they are and no matter what time it is
B. in major oceans and at scheduled time
C. at regular times everyday
D. from some fixed positions
Messages bearing the priority marking ROUTINE are to be broadcast _________.
A. immediately
B. at the next scheduled transmission
C. during the next available period
D. at anytime
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