單項選擇題The position if the AOR-w satellite in the INMARSAT system is（）above the equator.
A.64.5E
B.178E
C.15.5W
D.54W
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1.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
2.單項選擇題There is actually an overlap of（）ocean regions somewhere in Western European Waters.
A.as many as three
B.more than two
C.less than two
D.up to four
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The vessel has stayed in port for seven days because she needs（）.
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If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
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For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
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