單項(xiàng)選擇題General radio communications in the global system are those between（）concerning the management and operation of the ships and may have impact on their safety.

A.SAR party and the ship in distress
B.SAR authorities and the ship in distress and survival craft
C.A ship station and any coast station
D.Ship stations and shore-based communication network


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1.單項(xiàng)選擇題why do some stations keep silence?（）

A.Because they are not engaged in the distress traffic
B.they will affect the transmission of the distress traffic
C.The powers of these stations are very weak
D.They are not in charge of search and rescue

2.單項(xiàng)選擇題What channel is general communication used?（）

A.any appropriate channel except public communication
B.any appropriate channel except for public communications
C.any appropriate channel besides public communication
D.any appropriate channel beside public communication

3.單項(xiàng)選擇題What’s the advantage when using the satellites?（）

A.The message can be directed to the desired location
B.The message can follow the earth’s curvature
C.The quality of message can not be affected by climatic
D.The range of the message extend and the quality of reception is improved

4.單項(xiàng)選擇題Any ships fitted with SES can（）and（）through the satellite system when sending a distress alert.

A.enter the system / contact an RCC
B.access to INMARSAT / establish contact with a CES
C.have absolute priority to enter the system / make contact with a CES
D.enter the system gradually / wait for rescue

5.單項(xiàng)選擇題It is quite（）for an SES operator to send a distress alert.

A.easy and expensive
B.simple and certain
C.dangerous and stable
D.difficult and compulsory