单项选择题
A.square B.triangle C.circle D.rectangle
Vessel in distress（）indicate their position by any meth...
单项选择题Vessel in distress（）indicate their position by any method.
A.cannot B.are not allowed C.have the right D.should get permission to
The list of Coast Stations is republished（）in a triling...
单项选择题The list of Coast Stations is republished（）in a trilingual.
A.every two years B.every three years C.every year D.every four years
Having studied the INMARSAT document, GMDSS document, S...
单项选择题Having studied the INMARSAT document, GMDSS document, SOLAS Convention and other international navigation documents, we all know that the Chapter IV of SOLAS Convention is mainly about（）.
A.the radio regulations B.the technical terms and definitions C.how to operate the GMDSS SES equipment D.Maritime Communications
