单项选择题

Which EPIRB transmits a distress alert that is received and relayed by an INMARSAT satellite?（）

A.Class A EPIRBs
B.Class B EPIRBs
C.L-Band EPIRBs
D.Category I EPIRBs

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单项选择题

Which condition represents the appropriate time for setting off distress flares and rockets? （）

A.At one hour intervals
B.At half hour intervals
C.Only when there is a chance of their being seen by rescue vessels
D.Immediately upon abandoning the vessel

单项选择题

Which condition represents the appropriate time for setting off distress flares and rockets? （）

A.Only when there is a chance of their being seen by rescue vessels
B.At half hour intervals
C.At one hour intervals
D.Immediately upon abandoning the vessel

单项选择题

Which categories of NAVTEX messages may not be selectively rejected through receiver programming?（）

A.Navigational warnings
B.Weather warnings
C.SAR and distress alert information
D.All of the above