A.one-way
B.two-way
C.double-effect
D.one-effect
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A.distress
B.urgent
C.safety
D.general
A.call sign
B.port of register
C.radio name
D.signal label
A.EPIRB
B.SART
C.Mobile Station
D.Distress Alerting
A.COSPAS-SARSAT
B.ground receiving stations
C.storing distress signal
D.Near polar orbiting satellites
A.20 to 30
B.200
C.100
D.450
最新試題
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
Radio beacon can be activated（）in case of distress.
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.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
On-scene communications will normally take place between（）.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
（）will form the basis for distress alerting and safety calling.
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.
The rescue coordination center may（）on stations which interfere with traffic.
COSPAS-SARSAT is intended to be used for（）.