单项选择题

In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.

A.MF/HF
B.SART
C.EPIRB
D.any of A, B, C

相关考题

Radio beacon can be activated（）in case of distress.A.on...

单项选择题Radio beacon can be activated（）in case of distress.

A.only automatically
B.only manually
C.both automatically and manually
D.only by remote control

If the beacon is mounted at a wrong place, it may（）by s...

单项选择题If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.

A.be damaged
B.work normally regardless of harmful conditions
C.not wok though it is not in a bad condition

By using（）system a ship can send a distress message and...

单项选择题By using（）system a ship can send a distress message and know with certainty it will be received.

A.COSPAS-SARSAT
B.SATELLITE
C.terrestrial radio
D.INMARSAT

GMDSS