單項(xiàng)選擇題（）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


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1.單項(xiàng)選擇題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

2.單項(xiàng)選擇題What is the action that a GMDSS Radio Operator should take when a DSC distress alert is received? （）

A.No action is necessary，as the DSC control unit will automatically switch to the NBDP follow-on communications frequency
B.The operator should immediately set continuous watch on the radiotelephone frequency that is associated with the frequency band on which the distress alert was received
C.The Operator should immediately set continuous watch on VHF channel 70
D.The Operator should immediately set continuous watch on the NBDP frequency that is associated with the frequency band on which the distress alert was received

3.單項(xiàng)選擇題What is a GMDSS functional or carriage requirement for compulsory vessels?（）

A.A compulsory vessel must carry at least two (2) licensed GMDSS operators
B.A compulsory vessel must satisfy certain equipment carriage requirements that are determined by where the vessel sails
C.A compulsory vessel must be able to transmit and respond to distress alerts
D.All of the above

4.單項(xiàng)選擇題What is a functional or carriage requirement for compulsory vessels?（）

A.A compulsory vessel must carry at least two licensed GMDSS Radio Operators
B.A compulsory vessel must satisfy certain equipment carriage requirements that are determined by where the vessel sails
C.A compulsory vessel must be able to transmit and respond to distress alerts
D.All of the above

5.單項(xiàng)選擇題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