单项选择题
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
单项选择题 The position if the AOR-w satellite in the INMARSAT system is（）above the equator.
单项选择题 There is actually an overlapped area of（）ocean regions somewhere in Western European Waters.
单项选择题 There is actually an overlap of（）ocean regions somewhere in Western European Waters.
