A.submarine EPIRB
B.safety EPIRB
C.ship EPIRB
D.survival craft EPIRB
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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
A.How
B.What
C.Why
D.How about
最新試題
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
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.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
Radio beacon can be activated（）in case of distress.
We consider（）send a helicopter with medical facilities to the distress area.
（）will form the basis for distress alerting and safety calling.
The priority of EGC messages is classified by（）.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.