单项选择题

The SART should have sufficient battery capacity to operate in the stand-by condition for（）hours and should continuously work for（）hours.

A.120/20
B.56/18
C.100/16
D.96/8

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单项选择题

It is required that ships proceeding at sea should keep continuous watch on（）.

A.VHF channel16 and 13
B.appropriate DSC distress and safety frequency
C.INMARSAT TDM message channel
D.VHF channel 70 and channel 8

单项选择题

The transmission of a（）indicates that a ship is in distress and requires immediate assistance.

A.urgent traffic
B.distress alert
C.routine traffic
D.NAVTEX message

单项选择题

A ship station on receiving a shore-to-ship distress alert should（）.

A.keep silence
B.interfere with such communication
C.establish communication as directed and render such assistance as is required and appropriate
D.refuse communication as directed and render such assistance as it required and appropriate