A.enter the system/ contact an RCC
B.access to INMARSAT/establish contact with a CES
C.have absolutely priority to enter the system/make contact with a CES
D.enter the system gradually/wait for rescue
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A.1995
B.1998
C.1999
D.2000
A.they all have different limitations with respect to coverage
B.they all have different limitations in the technology they use
C.different systems apply to different ships
D.all of above
A.ship-to-shore
B.shore-to-ship
C.bridge-to-bridge
A.some
B.lots of
C.many
D.all
A.impossible
B.possible
C.easy
D.difficult
最新試題
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
Every lifeboat which is fitted with a fixed two-way vhf radiotelephone apparatus with（）which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
COSPAS-SARSAT is intended to be used for（）.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
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.
（）will form the basis for distress alerting and safety calling.
By using（）system a ship can send a distress message and know with certainty it will be received.
The rescue coordination center may（）on stations which interfere with traffic.
On-scene communications will normally take place between（）.
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.