單項選擇題

The GMDSS defines four sea area based on the（）.

A.location and capacity of the facilities located on board ships
B.Position and type of a sincre sintion
C.Capacity and location of shore based communication facilities
D.Position and capacity of mobile communication stations

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單項選擇題

The position of the POR satellite in the Inmarsat system is（）above the equator.

A.55.5W
B.64.5E
C.15.5W
D.178E

單項選擇題

There is actually an overlapped area of（）ocean regions somewhere in Western European waters.

A.two
B.three
C.more than two
D.more than three