单项选择题
（） 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
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相关考题
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单项选择题
（） is not required by bridge-to-bridge communications.
A.VHF
B.SART
C.NAVTEX
D.LES -
单项选择题
（）is an area within the radiotelephone coverage of at least one VHF coast station in which continuous Digital Selective Calling is available.
A.Sea Area A1
B.Sea Area A2
C.Sea Area A3
D.Sea Area A4 -
单项选择题
What is the basic concept of GMDSS? （）
A.Search and rescue authorities ashore can be alerted to a distress situation
B.Shipping in the immediate vicinity of a ship in distress will be rapidly alerted
C.Shoreside authorities and vessels can assist in a coordinated SAR operation with minimum delay
D.All of the above
