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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

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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

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

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