A.double frequencies
B.single frequency
C.dedicated frequency
D.multiple frequencies
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A.Inmarsat SES
B.VHF/DSC or MF/DSC
C.SART and VHF/DSC
D.Satellite EPIRB and VHF/DSC
A.indicate the ship in distress that the alert has been received
B.alert ships in the area of a distress incident that a distress has occurred
C.inform other coast station of distress incident
D.repeat the distress alert in 5 minutes
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On-scene communications will normally take place between（）.
The vessel has stayed in port for seven days because she needs（）.
COSPAS-SARSAT is intended to be used for（）.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
Every lifeboat which is fitted with a fixed two-way（）radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.