单项选择题
The SART should provide a（）indication of its correct operation and should also inform survivors when it is interrogated by radar.
A.sight or sound
B.seeing or sounding
C.visual or audible
D.seeing or hearing
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相关考题
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单项选择题
The ARQ mode should be applied（）.
A.when two stations communicate with each other
B.in any radio system and at any time
C.when one ship sends a message to another station
D.for communication among some stations -
单项选择题
Signals for locating will be transmitted in the 9GHz band by means of（）.
A.SART
B.DSC
C.NBDP
D.RT -
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 is required and appropriate
