A.can be overcome by using traditional techniques
B.can not be overcome by satellite system
C.can be overcome by satellite and digital techniques
D.can not be tackled by any modern system
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A.assist
B.send a rescue
C.search the distress area
D.Reach the distress position at once
A.INMARSAT, EPIRB and DSC
B.NAVTEX, NBDP and R/T
C.INMARSAT, VHF and SART
D.EPIRB, DSC and radar
A.distress and safety radio communication purposes
B.life-saving purpose
C.GMDSS requirements
D.emergency position
A.Q-code
B.Telephone numbers and addresses
C.the international Codes of Signals
D.radio instructions
A.digital codes
B.code messages
C.norse codes
D.distress messages
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Every lifeboat which is fitted with a fixed two-way vhf radiotelephone apparatus with（）which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
（）will form the basis for distress alerting and safety calling.
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.
The rescue coordination center may（）on stations which interfere with traffic.
The advantage of geostationary satellites is（）.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
Please use（）for（）.
COSPAS-SARSAT is intended to be used for（）.
Distress traffic is the communication（）between the station in distress and the ships, aircraft, coast radio stations, coast earth stations and rescue centers participating in the rescue work.
All coast radio stations（）DSC installed for VHF and HF.