单项选择题
A.are capable of following / distance B.can follow / altitude C.can hardly follow / shape D.are unable following / angle
Ships equipped with Inmarsat SES send distress alerts b...
单项选择题Ships equipped with Inmarsat SES send distress alerts both（）.
A.quick and good B.convenient and certain C.easily and simply D.important and difficult
In addition to communication equipment, the GMDSS will ...
单项选择题In addition to communication equipment, the GMDSS will introduce requirements of SARTs and EPIRBs designed to improve the（）.
A.living standards B.survival condition C.chance of survival D.technical specification
The GMDSS must combine all various subsystems, because（...
单项选择题The GMDSS must combine all various subsystems, because（）.
A.they all have different limitations with respect to coverage B.they all have different limitations in the technology they use C.different systems apply to different ships D.all of above
