A.the information can be received on an ordinary FM radio
B.warnings are printed out for reading when convenient
C.broadcasts are at scheduled times
D.a low frequency band is used for long distance transmission
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A.submarine EPIRB
B.safety EPIRB
C.ship EPIRB
D.survival craft EPIRB
A.is primarily designed for vessels operating up to 50 miles offshore or on foreign waters
B.transmits a signal that can be detected by satellite
C.must be manually activated
D.operates in the medium and low frequency bands
A.approved by the CCS
B.designed for float free，automatic activation
C.operated on 121.5/243 MHz
D.operated manually
A.a safety line attached to a man working over the side
B.used to measure water depth
C.used to slow the headway of a barge
D.used to measure the overhead height of a bridge
A.What
B.How
C.Which
D.When
最新試題
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
（）by an ice-breaker, it is important to maintain a continuous listening watch on the appropriate VHF channel and to maintain a proper look-out for sound and visual signals.
Before GMDSS, if the radio officer on board is serious ill,（）.
SOLAS ships shall be equipped with（）.
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.
We consider（）send a helicopter with medical facilities to the distress area.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
The rescue coordination center may（）on stations which interfere with traffic.
Radio beacon can be activated（）in case of distress.
The advantage of geostationary satellites is（）.