单项选择题

International SafetyNet and Navtex Services promulgate MSI by means of（）.

A.FEC and ARQ
B.satellite and terrestrial communications
C.radio and telex
D.NBDP

点击查看答案&解析

上一题目录下一题

单项选择题

A.by day or at night
B.almost round the clock
C.somewhat and sometime
D.from sunrise to sunset

单项选择题

A.transmit distress signal
B.send response signal
C.transmit the signal of ship‟s position
D.be interrogated by X-band radar

单项选择题

A.sight or sound
B.seeing or sounding
C.visual or audible
D.seeing or hearing