单项选择题
A.transmit distress signal B.send response signal C.transmit the signal of ship‟s position D.be start by X-band radar
Distress traffic（）all messages relating to the immediat...
单项选择题Distress traffic（）all messages relating to the immediate assistance required by the ship in distress, including search and rescue communications and signals for locating.
A.consists of B.is consisted of C.consisted of D.are consisted of
The transmission of a（）indicates that a ship is in dist...
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
The GMDSS is composed of（）.A.satellite and terrestrial ...
单项选择题The GMDSS is composed of（）.
A.satellite and terrestrial communication systems B.only navigational and alerting systems C.just MSI system and locating system D.SAR co-ordination system
