A.Ship stationsB.Coast stationsC.NCSsD.NCCDSC distress ……

单项选择题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

单项选择题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

单项选择题After has permit the commissioning, the（）will permit the SES access to system.

A.INMARSAT
B.IMO
C.MSC
D.CES

单项选择题There are（）NCSs in total, one in each ocean region, the AOR (E and W), IOR and POR.

A.3
B.2
C.1
D.4

单项选择题The NCC is located in the（）.

A.IMO Headquarters in London
B.Inmarsat Headquarters building in London
C.Western European Maritime Organization
D.International Maritime Safety Committee