Regarding the NAVTEX system, _________is not true.
A. NAVTEX is a single frequency broadcast system (using NBDP narrow band direct printing) Telex on 518 kHz.
B. A selective message -rejection feature of the receiver allows the mariner to receive only that safety information pertinent to his requirements.
C. NAVTEX must be broadcast in the prevailing language of the coast station only.
D. NAVTEX carries information relevant to all sizes and types of vessels within a region established for this service.
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The letter E in EPIRB is the abbreviation for the word _________.
A. English
B. Engineering
C. Edit
D. Emergency
The followings are used in the GMDSS except _________.
A. the Inmarsat system
B. VHF， MF and HF DSC systems
C. the Cospas-Sarsat system
D. AIS systems
Which one of the following keystrokes or characters is sent as part of ARQ communications to switch information transmission control from one station to the other?
A. The plus and question mark keys ('+?')
B. The 'ENTER' key
C. The go-ahead (GA) command
D. The 'END1 key
Ships sailing in _________ are able to receive and print out EGC messages.
A. a fixed area or NavArea in any ocean region
B. a NavArea or weather forecast area
C. area covered by Inmarsat satellites
D. anywhere of the world
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