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
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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
COSPAS-SARSAT is intended to be used 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.
The rescue coordination center may（）on stations which interfere with traffic.
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
Before GMDSS, if the radio officer on board is serious ill,（）.
At least two two-way VHF radiotelephone apparatus shall be provided on every cargo ship of（）tons gross tonnage and upwards but less than 500 tons gross tonnage.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
Ship-to-ship distress alerting should be conducted by（）.