A.no matter where they are and what time it is
B.at scheduled time and in major ocean regions
C.at fixed time and position
D.when they get permission
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A.be responsible for
B.have an impact on
C.command
D.give a guidance to
A.identity
B.identical
C.identify
D.identification
A.cannot
B.are no allowed
C.have the right
D.should get permission to
A.receive shore-to-ship distress alerting
B.transmit ship-to-shore distress alerting
C.receive message for public correspondence
D.transmit and receive locating signals
A.the radio regulations
B.the technical terms and definitions
C.how to operate the GMDSS SES equipment
D.Maritime Communications
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The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
Radio communication（）for many years and helps to save tens of thousands of lives.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
All coast radio stations（）DSC installed for VHF and HF.
The rescue coordination center may（）on stations which interfere with traffic.
Radiotelephony communication or radio telex communication or both will be carried out by terrestrial or satellite means,（）the equipment fitted on ship and the area in which the incident occurs.
International Navtex service means the coordinated broadcast and automatic reception on（）khz of maritime safety information by narrow-band direct-printing telegraphy using English language.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
Please use（）for（）.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.