A.A compulsory vessel must carry at least two licensed ……

单项选择题What does the DSC control unit do if the GMDSS radio operator fails to insert updated information when initiating a DSC distress alert?（）

A.It will abort the transmission and set off an audible alarm that must be manually reset
B.It will initiate the DSC distress alert but，as no information will be transmitted，rescue personnel will not be able to identify the vessel，its position or its situation
C.It will initiate the DSC distress alert and default information will automatically be transmitted
D.It will initiate the DSC distress alert，but any station receiving it will have to establish contact with the distressed vessel to determine its identity，position and situation

单项选择题What does EPIRB stand for? （）

A.Emergency Position Indicating Radar Buoy
B.Electronic Pulse Indicating Radiobeacon
C.Emergency Position Indicating Radiobeacon
D.None of the above

单项选择题What are the vessel equipment and personnel requirements for GMDSS? （）

A.Two licensed GMDSS radio operators
B.Equipment carriage requirements
C.Distress alerting and response
D.All of the above

单项选择题What are the conditions，under GMDSS，whereby a ship is NOT allowed to depart from any port? （）

A.The vessel is not capable of performing all required distress and safety functions
B.The vessel is carrying more than the required number of qualified GMDSS radio operators
C.The vessel has a temporary waiver of its radio license and Safety Certificate
D.The vessel is not carrying a GMDSS radio maintainer，but has provided for shoreside maintenance plus duplication of equipment if required

单项选择题VHF Radio is one of the very important navigational instruments on board，（）messages can be sent.

A.by which
B.through which
C.by that
D.through that