單項選擇題

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

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單項選擇題

（） 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

單項選擇題

（） is not required by bridge-to-bridge communications.

A.VHF
B.SART
C.NAVTEX
D.LES