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?
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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
Regarding Cospas-Sarsat in GMDSS, all of the followings are correct expect _________.
A. EPIRBs are units that are used as alerting devices.
B. There are satellites in a low-earth polar orbit that detect EPIRB beacons on 406 Mhz and relay the information to an earth-side Local User Terminal (LUT).
C. The Doppler frequency measurement concept is used to determine the EPIRB's location.
D. It works in 1.6 Ghz band.
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