單項(xiàng)選擇題From the ship owner’s point of view,（）is the most important advantage Inmarsat providing with.

A.business opportunity
B.good-quality radio telephone conversations
C.telex service
D.both B and C


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1.單項(xiàng)選擇題Ships sailing in（）are able to receive and print out EGC message.

A.a fixed area or Navarea in any ocean region
B.a Navarea or weather forecast area
C.the designated area or given geographic position
D.anywhere of the world

2.單項(xiàng)選擇題As each MSI message will have a unique identity, the printing of messages already received correctly is（）.

A.automatically suppressed
B.finished by the operator
C.manually suppressed
D.done again

3.單項(xiàng)選擇題DSC distress acknowledgements are normally transmitted by（）in respond to a receiver DSC distress call.

A.Ship stations
B.Coast stations
C.NCSs
D.NCC

4.單項(xiàng)選擇題Distress and safety communications following DSC calling will be performed by radiotelephony or（）.

A.NBDP
B.EGC receiver
C.NBDP or both
D.EGC receiver or both

5.單項(xiàng)選擇題If a ship station relays a DSC distress call to an appropriate coast station, it means that（）.

A.the ship has received the DSC distress call on a HF frequency
B.the coast station concerned has not acknowledged it within 5 minutes
C.the ship will take command of search and rescue in 5 minutes
D.A and B