單項(xiàng)選擇題

Each satellite broadcasts（）traffic on a designated channel.

A.LES
B.ESA
C.NCS
D.EGC

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單項(xiàng)選擇題

At sea，all required GMDSS equipment（other than survival craft equipment）must be proven operational by（）.

A.daily testing
B.either A or C
C.operational use of the equipment
D.testing at least every 48 hours

單項(xiàng)選擇題

（） operates at a transfer rate of up to 9600 bits per second and is telephone，telex and facsimile（fax）capable.

A.INMARSAT A
B.INMARSAT C
C.SafetyNET
D.NAVTEX