A.orbiting satellites in spaceB.commercial radio statio……

单项选择题All self-propelled vessels on an international voyage must be equipped with how many Emergency Position Indicating Radiobeacons (EPIRB)（）?

A.One approved Class A EPIRB
B.Two approved Class A EPIRBs
C.One approved Class B EPIRBs
D.Two approved Class B EPIRBs

单项选择题A vessel operating outside of coastal waters must carry an automatically activated Emergency Position Indicating Radio Beacon (EPIRB) if she（）.

A.does not have berthing facilities
B.has berthing and galley facilities
C.is a workboat and her mother ship carries an EPIRB
D.None of the above are correct

单项选择题A major advantage of the NAVTEX system when compared to other systems is that（）.

A.the information can be received on an ordinary FM radio
B.warnings are printed out for reading when convenient
C.broadcasts are at scheduled times
D.a low frequency band is used for long distance transmission

单项选择题A Class S EPIRB is a（）.

A.submarine EPIRB
B.safety EPIRB
C.ship EPIRB
D.survival craft EPIRB

单项选择题A Class C EPIRB（）.

A.is primarily designed for vessels operating up to 50 miles offshore or on foreign waters
B.transmits a signal that can be detected by satellite
C.must be manually activated
D.operates in the medium and low frequency bands