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
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SOLAS ships shall be equipped with（）.
Radio beacon can be activated（）in case of distress.
Before GMDSS, if the radio officer on board is serious ill,（）.
（）will form the basis for distress alerting and safety calling.
The advantage of geostationary satellites is（）.
Ship-to-ship distress alerting should be conducted by（）.
The vessel has stayed in port for seven days because she needs（）.
Please use（）for（）.
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.
All coast radio stations（）DSC installed for VHF and HF.