题目内容

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

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A. constructs
B. constructed
C. has constructed
D. was onstructed

A. 2182KHz
B. 2174.5KHz
C. 2191KHz
D. 2187.5KHz

A. routine
B. distress
C. urgency
D. safety

A. determining the position of a distress vessel
B. both a and c
C. distress communication
D. distress alerting and position fixing in Area A4